554 lines
28 KiB
HTML
554 lines
28 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<title>bioplastic factory — unturf.</title>
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="theme-color" content="#5871ad">
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<meta charset="utf-8">
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<link rel="stylesheet" href="/css/chunkfive/stylesheet.css" type="text/css" charset="utf-8" />
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<link rel="stylesheet" href="/css/pico.classless.min.css">
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<link rel="stylesheet" href="/css/unturf.css">
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</head>
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<body>
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<main class="content-wide">
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<center><a href="/"><h1 class="site-title">unturf.</h1></a></center>
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<center><h3>grow food not lawn</h3></center>
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<center class="nav-links"><small><a href="/let-us-define-a-permacomputer/">manifesto</a> · <a href="/eight-forms-of-capital/">eight forms of capital</a> · <a href="/single-use-plastics/">single-use plastics</a> · <a href="/hemp-bioplastic/">hemp bioplastic</a> · <a href="/hemp-bioplastic/process/">recipe</a> · <a href="/hemp-bioplastic/process/homeschool/">homeschool</a> · <a href="/hemp-bioplastic/process/factory/" aria-current="page">factory</a> · <a href="/software/">free software</a></small></center>
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<h2>Bioplastic Factory</h2>
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<p>
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A continuous-flow factory producing durable everyday products from plant fiber. Not batch processing. Not single-use packaging. Products survive years of daily use but biodegrade fully in hot aerobic compost (60-70C). Three fiber sources feed the same standardized process: hemp, nettle, & wood refuse. Designed for replication as distributed hubs worldwide.
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</p>
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<p>
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This page describes a complete 7-station production line. <a href="/hemp-bioplastic/process/">Batch recipes live on a process page</a>. <a href="/hemp-bioplastic/process/homeschool/">A 4-day homeschool curriculum lives on a homeschool page</a>. This factory page covers continuous production at community scale.
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</p>
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<!-- ============================================================ -->
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<!-- STATION OVERVIEW -->
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<!-- ============================================================ -->
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<span class="step-label">OVERVIEW</span>
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<h3>7-Station Flow</h3>
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<figure class="diagram">
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<img src="img/factory-flow.svg" alt="7-station continuous-flow bioplastic factory overview">
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<figcaption>fiber enters at station 1, finished products leave at station 6, compost demo runs at station 7.</figcaption>
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</figure>
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<table>
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<thead>
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<tr><th>Station</th><th>Name</th><th>Input</th><th>Output</th><th>Equipment</th><th>Cycle Time</th></tr>
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</thead>
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<tbody>
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<tr><td>1</td><td>Fiber Intake & Prep</td><td>Raw stalks & wood refuse</td><td>Prepared fiber (chopped, sorted)</td><td>Decorticator, chopper, retting tanks, scale</td><td>Continuous intake</td></tr>
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<tr><td>2</td><td>Extraction</td><td>Prepared fiber</td><td>Raw cellulose</td><td>Reaction vessels (3-4), filtration, pH meter</td><td>2-4 hours per vessel</td></tr>
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<tr><td>3</td><td>Washing & Drying</td><td>Raw cellulose</td><td>Dry cellulose</td><td>Counter-current wash line, convection dryer</td><td>4-8 hours</td></tr>
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<tr><td>4</td><td>Mixing</td><td>Dry cellulose</td><td>Mixed compound</td><td>Heated mixer, scale, pigment dispensers</td><td>60-90 minutes</td></tr>
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<tr><td>5</td><td>Pressing & Molding</td><td>Mixed compound</td><td>Pressed products</td><td>Hot press, mold sets, temperature controller</td><td>30-60 min per press</td></tr>
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<tr><td>6</td><td>Finishing</td><td>Pressed products</td><td>Finished goods</td><td>Trim station, inspection table, stamp press</td><td>5-10 min per product</td></tr>
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<tr><td>7</td><td>Compost Demo</td><td>Demo samples</td><td>Display & education</td><td>Hot compost bin (60-70C), timeline display</td><td>Ongoing display</td></tr>
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</tbody>
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</table>
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<!-- ============================================================ -->
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<!-- STATION 1: FIBER INTAKE -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 1</span>
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<h3>Fiber Intake & Prep</h3>
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<p>
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Three fiber sources converge into a single "prepared fiber" stream. Each source follows a parallel prep path adapted to its characteristics, then all merge at chopping & weighing.
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</p>
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<figure class="diagram">
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<img src="img/fiber-intake.svg" alt="Three fiber sources converging: hemp, nettle, wood refuse">
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<figcaption>hemp, nettle, & wood refuse follow parallel prep paths before merging.</figcaption>
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</figure>
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<h4>Hemp (primary source)</h4>
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<ul>
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<li>Bast fiber from stalks, 77% cellulose content</li>
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<li>Ret 3-45 days (depending on temperature) or water ret 10 days</li>
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<li>Decorticate: separate bast from hurd using decorticator or by hand</li>
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</ul>
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<h4>Nettle (secondary source)</h4>
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<ul>
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<li>Bast fiber from stalks, ~65% cellulose content<sup id="ref1"><a href="#fn1">[1]</a></sup></li>
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<li>Water ret 7-14 days, faster breakdown than hemp</li>
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<li>Strip bast fiber by hand or small decorticator</li>
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<li>Grows wild on marginal land, requires no cultivation</li>
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</ul>
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<h4>Wood Refuse (supplementary source)</h4>
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<ul>
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<li>Sawmill offcuts, chips, shavings from local timber operations</li>
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<li>Chip to uniform 2-5 mm pieces</li>
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<li>Sort: remove bark, knots, & resinous species (pine, cedar)</li>
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<li>Hardwoods preferred: beech, birch, poplar offer 40-50% cellulose<sup id="ref2"><a href="#fn2">[2]</a></sup></li>
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</ul>
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<h4>Convergence</h4>
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<ol>
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<li>Chop all prepared fiber to uniform 2-3 cm lengths</li>
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<li>Weigh & record source ratio per batch (enables quality tracking)</li>
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<li>Output: prepared fiber, ready for extraction</li>
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</ol>
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<div class="recipe-box">
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<b>Equipment list:</b> decorticator (hand-crank or motorized), fiber chopper, retting tanks (3-4 for rotation), sorting table, digital scale (1g precision), labeled storage bins per fiber source.
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</div>
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<!-- ============================================================ -->
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<!-- STATION 2: EXTRACTION -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 2</span>
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<h3>Extraction</h3>
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<p>
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Two extraction paths run as factory alternatives. A hub selects one path based on local chemistry comfort, waste handling capacity, & product goals. Both paths accept the same prepared fiber from Station 1 & output raw cellulose to Station 3.
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</p>
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<figure class="diagram">
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<img src="img/extraction-station.svg" alt="NaOH extraction path versus citric acid crosslinking path">
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<figcaption>each hub chooses one path. both produce usable cellulose for pressing.</figcaption>
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</figure>
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<h4>Path A: NaOH Extraction</h4>
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<div class="recipe-box">
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<b>Process:</b><br>
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1. Dissolve NaOH in water (5-12% solution depending on fiber source)<br>
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2. Add prepared fiber. Heat to 80C with stirring for 2-3 hours (or soak at room temperature for 4 hours using 5% NaOH)<sup id="ref3"><a href="#fn3">[3]</a></sup><br>
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3. Filter. Wash 4-6 times until pH neutral<br>
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4. Output: purified cellulose (removes lignin, hemicellulose, pectin)<br><br>
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<b>Continuous operation:</b> rotate 3-4 reaction vessels through stages. While vessel A soaks, vessel B gets filtered, vessel C gets loaded. No downtime.
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</div>
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<h4>Path B: Citric Acid Crosslinking</h4>
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<div class="recipe-box">
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<b>Process:</b><br>
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1. Spread prepared fiber onto screens, press into sheets<br>
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2. Soak sheets in citric acid + glycerol solution<br>
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3. Cure at 140C under pressure<sup id="ref4"><a href="#fn4">[4]</a></sup><br>
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4. Output: crosslinked cellulose material (up to 70 MPa tensile strength)<br><br>
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<b>Continuous operation:</b> stagger sheet production. While batch A cures, batch B soaks, batch C gets pressed into sheets.
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</div>
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<div class="honest-box">
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<b>Honest comparison:</b> citric acid path produces less chemical waste, avoids NaOH safety hazards, & requires simpler equipment. NaOH path achieves purer cellulose isolation & works better with mixed or lower-quality fiber sources. Neither path stays universally superior.
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</div>
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<!-- ============================================================ -->
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<!-- STATION 3: WASHING & DRYING -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 3</span>
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<h3>Washing & Drying</h3>
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<p>
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Buffer station between extraction & pressing. Removes residual chemicals, reduces moisture to pressing readiness.
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</p>
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<h4>Counter-Current Washing</h4>
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<p>
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Fresh water enters at the cleanest stage (final rinse). Used water from each stage flows backward to the dirtiest stage (first rinse). This approach reduces water consumption 3-4x compared to batch rinsing.<sup id="ref5"><a href="#fn5">[5]</a></sup>
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</p>
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<div class="recipe-box">
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<b>Wash stages:</b><br>
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1. First rinse (receives used water from stage 2, removes bulk chemicals)<br>
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2. Second rinse (receives used water from stage 3)<br>
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3. Third rinse (receives used water from stage 4)<br>
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4. Final rinse (receives fresh water only, output at pH 7)<br><br>
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<b>pH check:</b> test wash water after each stage. Final output must read pH 7 (neutral). Residual NaOH weakens finished products.
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</div>
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<h4>Drying</h4>
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<ul>
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<li><b>Convection dryer:</b> forced hot air at 60-80C, 4-6 hours to bone dry</li>
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<li><b>Solar tunnel (warm climates):</b> passive solar heat, 8-12 hours, zero energy cost</li>
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<li><b>Critical check:</b> weigh before & after drying. Weight must stabilize. Wet cellulose produces spongy, voided products when pressed.<sup id="ref6"><a href="#fn6">[6]</a></sup></li>
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</ul>
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<div class="warning-box">
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<b>Moisture kills quality.</b> Steam from trapped water creates internal voids during hot pressing. Every batch must reach stable dry weight before advancing to Station 4. This check represents the single most important quality gate in the entire factory.
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</div>
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<!-- ============================================================ -->
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<!-- STATION 4: MIXING -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 4</span>
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<h3>Mixing</h3>
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<p>
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Dried cellulose gets combined with glycerol (plasticizer), optional citric acid (water resistance), & optional natural pigments. Glycerol ratio determines product flexibility.
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</p>
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<h4>Glycerol Ratios</h4>
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<table>
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<thead>
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<tr><th>Glycerol %</th><th>Result</th><th>Products</th></tr>
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</thead>
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<tbody>
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<tr><td>15%</td><td>Rigid</td><td>Plates, trivets, plant labels, seed trays</td></tr>
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<tr><td>20%</td><td>Semi-flexible</td><td>Bowls, cups, plant pots, lidded boxes</td></tr>
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<tr><td>30%</td><td>Flexible</td><td>Lids, gaskets, protective wraps</td></tr>
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</tbody>
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</table>
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<h4>Optional Additives</h4>
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<ul>
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<li><b>Citric acid (5% by weight):</b> improves water resistance 7-fold<sup id="ref4b"><a href="#fn4">[4]</a></sup></li>
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<li><b>Natural pigments:</b> turmeric (yellow), spirulina (green), charcoal (black), beetroot powder (red)</li>
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</ul>
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<div class="recipe-box">
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<b>Mixing process:</b><br>
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1. Weigh dried cellulose<br>
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2. Calculate glycerol by target ratio (e.g., 100g cellulose + 20g glycerol for 20% semi-flex)<br>
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3. Add water to form a workable slurry<br>
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4. Heat to 80C & stir for 60 minutes until homogeneous<sup id="ref7"><a href="#fn7">[7]</a></sup><br>
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5. Add citric acid & pigments during last 10 minutes<br>
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6. Spread on trays, dry at 60C until weight stabilizes<br>
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7. Grind to breadcrumb consistency<br>
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8. Output: mixed compound, ready for pressing
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</div>
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<!-- ============================================================ -->
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<!-- STATION 5: PRESSING & MOLDING -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 5</span>
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<h3>Pressing & Molding</h3>
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<p>
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Hot press transforms mixed compound into finished shapes. Mold rotation keeps the press running continuously: while one mold cures, another gets loaded, a third cools, a fourth gets demolded.
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</p>
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<figure class="diagram">
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<img src="img/pressing-station.svg" alt="Mold rotation cycle: load, cure, cool, demold">
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<figcaption>mold rotation enables 4-6 press cycles per day per mold set.</figcaption>
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</figure>
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<h4>Product Mold Catalog</h4>
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<table>
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<thead>
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<tr><th>Product</th><th>Mold Type</th><th>Temp (C)</th><th>Pressure</th><th>Time</th><th>Weight</th></tr>
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</thead>
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<tbody>
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<tr><td>Bowl (15 cm)</td><td>Two-part concave</td><td>160</td><td>Medium</td><td>20 min</td><td>80g</td></tr>
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<tr><td>Plate (22 cm)</td><td>Flat with rim</td><td>150</td><td>High</td><td>15 min</td><td>120g</td></tr>
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<tr><td>Cup (250 mL)</td><td>Two-part cylinder</td><td>170</td><td>Medium</td><td>20 min</td><td>60g</td></tr>
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<tr><td>Trivet (18 cm)</td><td>Flat solid</td><td>180</td><td>High</td><td>25 min</td><td>150g</td></tr>
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<tr><td>Plant pot (12 cm)</td><td>Two-part tapered</td><td>160</td><td>Medium</td><td>20 min</td><td>90g</td></tr>
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<tr><td>Seed tray (30x20 cm)</td><td>Multi-cavity</td><td>170</td><td>High</td><td>25 min</td><td>200g</td></tr>
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<tr><td>Lidded box (15 cm)</td><td>Three-part (base+lid+walls)</td><td>180</td><td>High</td><td>30 min</td><td>180g</td></tr>
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<tr><td>Desk organizer</td><td>Multi-compartment</td><td>180</td><td>High</td><td>30 min</td><td>160g</td></tr>
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</tbody>
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</table>
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<div class="recipe-box">
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<b>Press cycle:</b><br>
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1. Coat mold interior with thin vegetable oil layer<br>
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2. Fill with dry compound, compress lightly by hand, add lid<br>
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3. Load into hot press at target temperature<br>
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4. Apply full pressure & hold for target time<br>
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5. Release pressure<br>
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6. Remove mold, set on cooling rack<br>
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7. Slow cool (minimum 30 minutes, longer for thick products)<br>
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8. Demold when cool to touch<br>
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9. Clean mold & return to loading station
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</div>
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<!-- ============================================================ -->
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<!-- STATION 6: FINISHING -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 6</span>
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<h3>Finishing</h3>
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<p>
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Final quality gate before products leave the factory. Three substations run in sequence.
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</p>
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<h4>Trimming</h4>
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<ul>
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<li>Remove flash (excess material squeezed from mold edges)</li>
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<li>Sand any rough surfaces or mold lines</li>
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<li>File edges smooth</li>
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</ul>
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<h4>Inspection</h4>
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<table>
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<thead>
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<tr><th>Check</th><th>Pass</th><th>Fail (regrind)</th></tr>
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</thead>
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<tbody>
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<tr><td>Surface</td><td>Smooth, uniform color</td><td>Bubbled, porous, discolored</td></tr>
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<tr><td>Sound (tap test)</td><td>Solid "click"</td><td>Hollow "thud" (internal voids)</td></tr>
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<tr><td>Flex</td><td>Appropriate for glycerol ratio</td><td>Brittle cracks or too soft</td></tr>
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<tr><td>Weight</td><td>Within 10% of target</td><td>Under (voids) or over (wet)</td></tr>
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<tr><td>Water drop</td><td>Beads or absorbs slowly</td><td>Absorbs instantly (needs more citric acid)</td></tr>
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</tbody>
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</table>
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<p>
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Failed products get reground & returned to Station 4 for remixing. Nothing gets wasted.
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</p>
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<h4>Stamping</h4>
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<ul>
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<li>Production date (month/year)</li>
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<li>Fiber source (H = hemp, N = nettle, W = wood, or combo)</li>
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<li>Compost instructions: "HOT COMPOST 60C+ ONLY"</li>
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<li>Hub identifier code</li>
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</ul>
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<!-- ============================================================ -->
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<!-- STATION 7: COMPOST DEMO -->
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<!-- ============================================================ -->
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<span class="step-label">STATION 7</span>
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<h3>Compost Demo Station</h3>
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<p>
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Display, not production. Shows customers & visitors exactly what happens to these products at end of life. A maintained hot compost bin (60-70C) contains products at various stages of decomposition.
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</p>
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<div class="honest-box">
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<b>Composting requires specific conditions.</b> These products biodegrade ONLY in hot aerobic compost reaching 60-70C for sustained periods. They do NOT break down in cold compost piles, landfills, waterways, or soil burial at ambient temperature. "Compostable" means compostable under controlled thermophilic conditions, not "throw anywhere & it vanishes."
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</div>
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<h4>Decomposition Timeline (Hot Aerobic Compost, 60-70C)</h4>
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<table>
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<thead>
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<tr><th>Week</th><th>Observation</th></tr>
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</thead>
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<tbody>
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<tr><td>0-2</td><td>No visible change. Product retains shape & strength.</td></tr>
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<tr><td>2-4</td><td>Surface softening begins. Color shifts darker.</td></tr>
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<tr><td>4-8</td><td>Product deforms under compost weight. Surface texture becomes rough.</td></tr>
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<tr><td>8-12</td><td>Fragmentation begins. Product breaks into large pieces when handled.</td></tr>
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<tr><td>12-16</td><td>Pieces fragment further. Material becomes indistinguishable from surrounding compost.</td></tr>
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<tr><td>16-24</td><td>Full decomposition. Only cellulose fibers remain, fully integrated into compost.</td></tr>
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</tbody>
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</table>
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<div class="warning-box">
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<b>NOT cold pile. NOT landfill. NOT water.</b> A cold backyard compost pile rarely exceeds 40C. These products survive cold piles indefinitely (which counts as a feature during their useful life, not a composting failure). Direct customers to municipal hot compost facilities or dedicated thermophilic composting setups.
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</div>
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<!-- ============================================================ -->
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<!-- PRODUCT CATALOG -->
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<!-- ============================================================ -->
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<span class="step-label">PRODUCTS</span>
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<h3>Product Catalog</h3>
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<figure class="diagram">
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<img src="img/product-catalog.svg" alt="Three product categories: kitchen, garden, storage">
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<figcaption>all products share the same base material. glycerol ratio & mold shape create variety.</figcaption>
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</figure>
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<h4>Kitchen & Dining</h4>
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<table>
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<thead>
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<tr><th>Product</th><th>Dimensions</th><th>Weight</th><th>Glycerol</th><th>Lifespan</th><th>Care</th></tr>
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</thead>
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<tbody>
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<tr><td>Bowl</td><td>15 cm diameter, 7 cm deep</td><td>80g</td><td>20%</td><td>3-5 years</td><td>Hand wash, dry promptly</td></tr>
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<tr><td>Plate</td><td>22 cm diameter</td><td>120g</td><td>15%</td><td>3-5 years</td><td>Hand wash, dry promptly</td></tr>
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<tr><td>Cup</td><td>250 mL, 9 cm tall</td><td>60g</td><td>20%</td><td>2-3 years</td><td>Hand wash, no hot liquids above 80C</td></tr>
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<tr><td>Trivet</td><td>18 cm diameter, 1 cm thick</td><td>150g</td><td>15%</td><td>5+ years</td><td>Wipe clean</td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<h4>Garden & Growing</h4>
|
|
<table>
|
|
<thead>
|
|
<tr><th>Product</th><th>Dimensions</th><th>Weight</th><th>Glycerol</th><th>Lifespan</th><th>Care</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr><td>Plant pot</td><td>10-15 cm diameter</td><td>90g</td><td>15%</td><td>2-3 seasons outdoors</td><td>None needed (degrades slowly in soil contact)</td></tr>
|
|
<tr><td>Seed tray</td><td>30x20 cm, 6 cells</td><td>200g</td><td>15%</td><td>3-5 seasons</td><td>Rinse between uses, dry before storing</td></tr>
|
|
<tr><td>Plant label</td><td>12x3 cm</td><td>10g</td><td>15%</td><td>1-2 seasons</td><td>Write with pencil (survives weathering)</td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<h4>Storage & Organization</h4>
|
|
<table>
|
|
<thead>
|
|
<tr><th>Product</th><th>Dimensions</th><th>Weight</th><th>Glycerol</th><th>Lifespan</th><th>Care</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr><td>Lidded box</td><td>15x15x8 cm</td><td>180g</td><td>20%</td><td>5+ years</td><td>Wipe clean, keep dry</td></tr>
|
|
<tr><td>Desk organizer</td><td>25x10x8 cm</td><td>160g</td><td>15%</td><td>5+ years</td><td>Wipe clean</td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<div class="warning-box">
|
|
<b>Dishwasher temperatures above 60C soften products.</b> Hand wash only. Products tolerate brief water contact (washing, rain) but should not soak overnight. Prolonged hot water exposure reverses the crosslinking that provides rigidity.
|
|
</div>
|
|
|
|
<!-- ============================================================ -->
|
|
<!-- FACTORY ECONOMICS -->
|
|
<!-- ============================================================ -->
|
|
|
|
<span class="step-label">ECONOMICS</span>
|
|
<h3>Factory Economics</h3>
|
|
|
|
<h4>Throughput</h4>
|
|
<table>
|
|
<thead>
|
|
<tr><th>Metric</th><th>Daily</th><th>Weekly (5 days)</th><th>Annual (250 days)</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr><td>Fiber processed</td><td>20-30 kg</td><td>100-150 kg</td><td>5,000-7,500 kg</td></tr>
|
|
<tr><td>Products pressed</td><td>40-80 pieces</td><td>200-400 pieces</td><td>10,000-20,000 pieces</td></tr>
|
|
<tr><td>Revenue (at $5-15 avg)</td><td>$200-1,200</td><td>$1,000-6,000</td><td>$50,000-300,000</td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<h4>Equipment Startup Costs</h4>
|
|
<table>
|
|
<thead>
|
|
<tr><th>Item</th><th>Minimum (used/DIY)</th><th>Mid-range</th><th>Professional</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr><td>Decorticator (hand-crank)</td><td>$500</td><td>$2,000</td><td>$8,000</td></tr>
|
|
<tr><td>Fiber chopper</td><td>$200</td><td>$800</td><td>$3,000</td></tr>
|
|
<tr><td>Retting tanks (3-4)</td><td>$300</td><td>$1,000</td><td>$4,000</td></tr>
|
|
<tr><td>Reaction vessels (3-4)</td><td>$600</td><td>$2,500</td><td>$10,000</td></tr>
|
|
<tr><td>Filtration & wash line</td><td>$400</td><td>$1,500</td><td>$6,000</td></tr>
|
|
<tr><td>Convection dryer</td><td>$800</td><td>$3,000</td><td>$12,000</td></tr>
|
|
<tr><td>Heated mixer</td><td>$300</td><td>$1,200</td><td>$5,000</td></tr>
|
|
<tr><td>Hot press (hydraulic)</td><td>$2,000</td><td>$8,000</td><td>$25,000</td></tr>
|
|
<tr><td>Mold sets (8 products)</td><td>$1,500</td><td>$4,000</td><td>$12,000</td></tr>
|
|
<tr><td>Finishing station</td><td>$200</td><td>$500</td><td>$2,000</td></tr>
|
|
<tr><td>Safety equipment</td><td>$300</td><td>$500</td><td>$1,000</td></tr>
|
|
<tr><td>Workspace setup</td><td>$5,000</td><td>$10,000</td><td>$25,000</td></tr>
|
|
<tr><td><b>Total</b></td><td><b>$12,100</b></td><td><b>$35,000</b></td><td><b>$113,000</b></td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<h4>Labor</h4>
|
|
<ul>
|
|
<li><b>Minimum crew:</b> 2 people run all 6 production stations</li>
|
|
<li><b>Comfortable crew:</b> 3 people (fiber prep, chemistry, pressing)</li>
|
|
<li><b>Training time:</b> 2-4 weeks from novice to independent operation</li>
|
|
</ul>
|
|
|
|
<!-- ============================================================ -->
|
|
<!-- DISTRIBUTED HUB MODEL -->
|
|
<!-- ============================================================ -->
|
|
|
|
<span class="step-label">HUBS</span>
|
|
<h3>Distributed Hub Model</h3>
|
|
|
|
<p>
|
|
One factory proves the concept. Many factories change material culture. Each hub adapts fiber sources to local ecology & product mix to local demand while following a standardized process for quality consistency.
|
|
</p>
|
|
|
|
<figure class="diagram">
|
|
<img src="img/distributed-hub.svg" alt="Hub replication model: local fiber, standardized process, local products">
|
|
<figcaption>each hub sources locally, processes consistently, sells locally.</figcaption>
|
|
</figure>
|
|
|
|
<h4>Hub Specification</h4>
|
|
<table>
|
|
<thead>
|
|
<tr><th>Component</th><th>Standardized</th><th>Localized</th></tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr><td>Equipment</td><td>Same specs, same layout</td><td>Sourced from local suppliers where possible</td></tr>
|
|
<tr><td>Recipes</td><td>Same ratios, temps, times</td><td>Adjusted for local fiber cellulose content</td></tr>
|
|
<tr><td>Quality checks</td><td>Same inspection criteria</td><td>Same pass/fail thresholds</td></tr>
|
|
<tr><td>Fiber sources</td><td>Same prep standards</td><td>Whatever grows locally (hemp, nettle, kenaf, jute, wood)</td></tr>
|
|
<tr><td>Products</td><td>Same mold designs available</td><td>Hub selects product mix based on local demand</td></tr>
|
|
<tr><td>Pricing</td><td>Cost-plus formula</td><td>Adjusted to local purchasing power</td></tr>
|
|
<tr><td>Training</td><td>Same curriculum & certification</td><td>Delivered in local language by local trainers</td></tr>
|
|
<tr><td>Branding</td><td>Shared quality mark</td><td>Hub name & local identity</td></tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<div class="recipe-box">
|
|
<b>Replication Checklist</b><br><br>
|
|
☐ Identify local fiber sources (minimum 2 for supply resilience)<br>
|
|
☐ Secure workspace: 80-150 m2, ventilated, water access, 3-phase power<br>
|
|
☐ Source or build equipment (see startup cost table)<br>
|
|
☐ Recruit & train crew of 2-3 people (2-4 week training program)<br>
|
|
☐ Run 50 test batches before selling (refine recipes for local fiber)<br>
|
|
☐ Establish local fiber supply agreements with farmers or foragers<br>
|
|
☐ Set up composting partnership (municipal or dedicated facility)<br>
|
|
☐ Launch with 3-4 products, expand based on demand<br>
|
|
☐ Document local adaptations & share with hub network
|
|
</div>
|
|
|
|
<!-- ============================================================ -->
|
|
<!-- HONEST SUMMARY -->
|
|
<!-- ============================================================ -->
|
|
|
|
<hr>
|
|
|
|
<h3>Honest Summary</h3>
|
|
|
|
<p>
|
|
A bioplastic factory at community scale requires real investment ($12k-113k), real labor (2-3 full-time people), & real fiber supply chains. Products compete on durability & compostability, not on price. A bowl that lasts 5 years & composts afterward occupies a different market than a $1 petroleum plastic bowl that persists for centuries.
|
|
</p>
|
|
|
|
<p>
|
|
The distributed hub model works only if each hub achieves consistent quality. Standardized recipes & inspection criteria make that possible. Local fiber sourcing makes each hub resilient to supply disruption. The goal: dozens of hubs producing everyday objects from local plant fiber, each adapted to its ecology & economy.
|
|
</p>
|
|
|
|
<p>
|
|
None of this replaces reducing consumption. Using fewer things remains better than producing more compostable things. But for everyday objects that communities need regardless, growing the material locally & composting it locally closes a cycle that petroleum never can.
|
|
</p>
|
|
|
|
<!-- ============================================================ -->
|
|
<!-- SOURCES -->
|
|
<!-- ============================================================ -->
|
|
|
|
<hr>
|
|
|
|
<h3>Sources</h3>
|
|
|
|
<div class="footnotes">
|
|
<ol>
|
|
<li id="fn1">Bodros & Baley (2008), "Study of the tensile properties of stinging nettle fibres (<i>Urtica dioica</i>)," <i>Materials Letters</i>. Nettle bast fiber composition & mechanical properties. <a href="#ref1">↩</a></li>
|
|
|
|
<li id="fn2">Rowell et al. (2005), "Cell Wall Chemistry," in <i>Handbook of Wood Chemistry and Wood Composites</i>. Hardwood cellulose content ranges 40-50%. <a href="#ref2">↩</a></li>
|
|
|
|
<li id="fn3">Dhakal et al. (2022), <a href="https://pmc.ncbi.nlm.nih.gov/articles/PMC9182753/" target="_blank">PMC 9182753</a>. 5% NaOH treatment of hemp at room temperature for 1-4 hours. Gentlest effective protocol. <a href="#ref3">↩</a></li>
|
|
|
|
<li id="fn4">Beluns et al. (2023), "Sustainable hemp-based bioplastics with tunable properties via reversible thermal crosslinking of cellulose," <a href="https://pubmed.ncbi.nlm.nih.gov/37245763/" target="_blank"><i>Int J Biol Macromol</i></a>. Citric acid crosslinking at 140C, up to 70 MPa tensile strength, 7-fold water uptake reduction. <a href="#ref4">↩</a></li>
|
|
|
|
<li id="fn5">Geankoplis (2003), <i>Transport Processes and Separation Process Principles</i>. Counter-current washing principles & water reduction factors. <a href="#ref5">↩</a></li>
|
|
|
|
<li id="fn6">Robert Murray-Smith, <a href="https://www.youtube.com/watch?v=REqqJOaE30U" target="_blank">"Hot Press Molding Hemp Casein Plastic"</a> (2020). On moisture & pressing: "if it's wet and you heat it and press it, you'll press off a lot of steam and it won't form properly." <a href="#ref6">↩</a></li>
|
|
|
|
<li id="fn7"><a href="https://bio-protocol.org/exchange/minidetail?id=21294617&type=30" target="_blank">Bio-protocol</a> (2025). Hemp cellulose + glycerol + NaOH, stirred 60 min at 80C, hot pressed at 240C for 10 min. <a href="#ref7">↩</a></li>
|
|
</ol>
|
|
</div>
|
|
|
|
<hr>
|
|
|
|
<p><a href="/hemp-bioplastic/process/">← recipe (full process)</a> · <a href="/hemp-bioplastic/process/homeschool/">homeschool recipe</a> · <a href="/hemp-bioplastic/">hemp bioplastic overview</a> · <a href="/single-use-plastics/">single-use plastics</a> · <a href="/hemp-bioplastic/process/factory/password">change password</a></p>
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