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Learn The Basics Of Mycelium-Based Packaging Material Cultivation

Learn The Basics Of Mycelium-Based Packaging Material Cultivation — a free beginner-level guide covering learn the basics of mycelium-based packaging...

129 min read10 chaptersbeginner

What you will learn

  1. Meet the Beast: Mycelium Unfiltered
  2. Feed the Monster: Substrate Selection Street Smarts
  3. Sterile or Die: Contamination Warfare
  4. Pick Your Fighter: Strain Sourcing and Culture Game
  5. Inoculation Station: Planting the Seed Without Screwing Up
  6. The Incubation Chamber: Environmental Control or Chaos
  7. Shape the Future: Molding and Forming the Goods
  8. Done or Dead: Reading Colonization Completion
  9. Kill It and Keep It: Deactivation and Drying Protocol
  10. Proof of Work: Testing Quality Without a Lab

1. Meet the Beast: Mycelium Unfiltered

You ever hold a piece of plastic packaging and think, "Yeah, this is gonna outlive my great-grandkids"? Styrofoam. The absolute worst. It breaks, it crumbles, it chokes the planet, and it sits in a landfill for five hundred years just to mock human intelligence. But you’re here because you want to weaponize a living organism to crush that plastic garbage into dust. Respect. You’re looking to grow packaging. Actual, physical, solid packaging out of a fungus. Highkey delusional? Maybe. But it’s the best kind of delusional, chief. It’s the kind that changes the game. Before you start playing God with molds and substrates, you need to know exactly what the hell you’re dealing with. You can’t wield a weapon if you don’t know how the trigger works. Mycelium isn’t some magic dust you sprinkle on trash to make it disappear. It’s a biological machine. A hungry, relentless, network-building beast. Still with me, or you zoning out already? Snap back. We’re dissecting this beast right now. No scalpel, just bare hands. Core Carnage (Rip Apart the Essentials) Let’s get down to the cellular level. No fluff. Just facts. Mycelium is the vegetative part of a fungus. Think of it as the roots, the body, the heavy machinery. But structurally? It’s a masterclass in biological engineering. Mycelium is made up of microscopic threads called hyphae (singular: hypha). These hyphae are essentially long, tubular cells. Now, how does a soft, microscopic tube turn into a solid block that can protect a heavy electronics shipment? Two words: Chitin and Branching. 🎯 Key Insight: Mycelium doesn't just "grow." It aggressively forages. It secretes enzymes to break down food externally, absorbs the nutrients, and uses that energy to extend its hyphal tips. It is a microscopic mining operation. Each hyphal cell is surrounded by a rigid cell wall made of chitin. Yeah, the same tough polymer that makes crab shells and insect exoskeletons. This ain't no flimsy plant cellulose. Chitin is armor. As the hyphae grow, they branch. Constantly. One tube becomes two. Two become four. Four become eight. They weave into each other, crossing paths, fusing together (a process called anastomosis), and creating a three-dimensional matrix. Imagine pouring a thousand miles of microscopic steel cables into a mold, tangling them, and fusing them at every intersection. That’s what mycelium does. As it consumes its food, it packs this chitin-armored network denser and denser. The threads lock together. The matrix tightens. Boom. You have a solid material. 💡 Pro Tip: The strength of your final packaging doesn't just come from the fungus itself. It comes from the friction and bonding of this tightly woven hyphal network against the physical particles of whatever food source (substrate) you …

2. Feed the Monster: Substrate Selection Street Smarts

You think mycelium gives a damn about your vibes? You saw that white network in Chapter 1 and thought, "Cool, I'll just throw it in a bucket and it'll eat whatever." Wrong. Dead wrong. You don't feed a Ferrari swamp water, and you don't feed a monster random garbage. You give it the right fuel, prepped the right way, or it dies starving in a pile of its own waste. Let's talk about what goes in the bowl. Core Carnage (Rip Apart the Essentials) The Menu: What Counts as "Waste"? Your mycelium is a lawnmower with a taste for dead stuff. Specifically, lignocellulosic waste. That's a fancy word for "plant guts that humans can't use." Sawdust: The classic. Hardwood sawdust is the filet mignon of the substrate world. Oak, maple, beech—these are your heavy hitters. Softwoods? Pine? Cedar? Forget about it. Those are loaded with resins and terpenes that act like poison to your culture. You're not building a sauna, chief. Hemp Hurd: The inner core of the hemp stalk. This stuff is gold. High cellulose, perfect structure, and it holds water like a sponge. If you can get it, you're playing on easy mode. Corn Stalks: The leftovers after the harvest. Cheap. Everywhere. But tough. You need to chop it fine and hydrate it heavy. It's the "budget meal" of substrates—works, but requires more prep. 💡 Pro Tip: Don't just grab sawdust from a random lumber yard. Ask if it's 100% hardwood. A single piece of pressure-treated wood in that pile will kill your entire grow with copper and arsenic compounds. Verify the source like your operation depends on it—because it does. The C:N Ratio: The Diet Plan That Decides Life or Death Here's where dreamers go to die. The Carbon-to-Nitrogen ratio. The C:N. Mycelium needs carbon for energy and structure. It needs nitrogen for protein synthesis and growth. Too much carbon? It starves for nitrogen, growth crawls. Too much nitrogen? It drowns in ammonia, the pH swings, and your culture dies in a toxic soup. The sweet spot? 60:1 to 100:1 for most packaging strains. That means 60 to 100 parts carbon for every 1 part nitrogen. Sawdust alone? C:N is around 500:1. That's pure carbon. Your mycelium will sit there like a bodybuilder trying to grow on a diet of pure sugar—lots of energy, no building blocks. That's why we supplement. We add nitrogen-rich materials to balance the scales. 🎯 Key Insight: The C:N ratio isn't just a number—it's the throttle on your colonization speed. Get it right, and your mycelium tears through the substrate like a hot knife through butter. Get it wrong, and you're watching paint dry while contaminants circle like vultures. The Supplement Game: …

3. Sterile or Die: Contamination Warfare

You ever walk into a room and immediately know something died in the walls? That sour, rotting-fruit smell hitting you like a sledgehammer? Yeah. That’s the smell of two weeks of hard work flushing straight down the toilet because you got lazy with a spray bottle. Welcome to the trenches, dreamer. You picked your substrate. You measured your carbon-to-nitrogen ratio like a pro. You’re feeling like a wizard. But right now, your sawdust and bran mix isn't just a buffet for your Pleurotus mycelium. It’s an all-you-can-eat VIP lounge for every microscopic freeloader in a ten-mile radius. Still with me, or you zoning out already? Snap out of it. This is where the weak perish. We are entering Contamination Warfare. In the mycelium game, you aren't just growing fungus. You are waging biological warfare against the entire planet. The air you breathe, the skin you’re shedding, the breath you just took—everything is covered in invisible enemies trying to steal your lunch. If you don't master sterile technique, your batches will rot. Period. ⚠️ Common Mistake: Thinking "clean" means "looks clean." Your kitchen counter might shine like a diamond under the fluorescent lights, but it’s absolutely crawling with billions of bacteria and mold spores. If you can see the contamination, the battle is already lost. We fight blind here. Core Carnage (Rip Apart the Essentials) Let’s break down the enemy ranks, your weaponry, and the brutal truth of field combat. No fluff. Just survival. The Enemy Roster: Know Thy Foe You need to know exactly what is trying to invade your turf. Not all contamination looks the same, but it all smells like failure. 1. Trichoderma (The Green Reaper) This is public enemy number one. If you’re gonna get wrecked by anything, it’s probably this. It starts off looking suspiciously like your healthy white mycelium. It’ll be white, fluffy, growing fast. You might think, "Damn, look at my Pleurotus go!" Highkey delusional. Give it 48 hours. That pristine white patches up into a vicious, vibrant green powder. That green is a massive load of spores. Once it drops those spores, your grow space is compromised for weeks. How does it get in? Dirty tools. Unfiltered air. Bad spore syringes. It thrives in the exact same conditions your mycelium loves. It’s the ultimate opportunist. 2. Bacteria (The Sour Slime) Bacteria don't play fair. They don't need a perfect substrate. They just need moisture and a little warmth. If your substrate is too wet, bacteria will beat your mycelium to the punch every single time. You won't see fluffy growth. What you’ll see is a slimy, translucent patch. Sometimes it looks yellowish, sometimes grayish. But the real tell? The smell. A healthy mycelium …

4. Pick Your Fighter: Strain Sourcing and Culture Game

You ever watch some clown walk into a ring ready to throw hands, but they forgot their gloves? That's you right now, dreamer. You got your substrate picked out, you got your sterile gameplan from Sterile or Die: Contamination Warfare locked in your skull, and you're standing there with your fists up but NO FIGHTER in your corner. Zero. Zilch. Just vibes and empty intentions. You need the actual organism, the living, breathing beast, or all that prep work is just a expensive science fair project that never gets off the ground. Let's fix that. Core Carnage (Rip Apart the Essentials) You don't just "get" mycelium, chief. You acquire a specific stage of its life. Remember the lifecycle from Meet the Beast: Mycelium Unfiltered? We talked about spores, we talked about the network, we talked about the fruiting body. Well, when you're sourcing a culture, you're picking which phase of that lifecycle you want to inject into your substrate. Pick wrong, and you're burning money. Pick right, and you're a needle mover. Let's break down the four fighters standing in front of you. 1. The Spore Syringe (The Genetic Lottery) This is a syringe full of water and millions of spores. Remember Phase 1: The Spore (Ghost Dust)? This is that dust, suspended in liquid. Here's the dirty truth: spores are a gamble. You are not getting a exact genetic copy of a champion mushroom. You're getting millions of unknowns. When those spores germinate, they combine, and what comes out is a genetic toss-up. Sometimes you get a winner. Sometimes you get a weak, slow-growing mutt that eats your substrate and gives you nothing. ⚠️ Common Mistake: Buying a spore syringe for production work thinking it's a shortcut. It's not. It's a bottleneck. Spores are for breeding, not for bulk production. If you're trying to make packaging, you need consistency, not a surprise party. 2. Liquid Culture (The IV Drip) This is mycelium already alive, growing in a nutrient-rich liquid. Usually sugar water or honey water. This is the fast track. The mycelium is already awake, already eating, already a network. You inject it, and it hits the ground running. No germination required. Liquid Culture (LC) is the golden child for beginners. It's fast. It's aggressive. But it's also the easiest thing to contaminate if you don't know what you're doing. One bad batch of LC and you're growing black mold soup instead of packaging material. 💡 Pro Tip: Always test your Liquid Culture on a small batch of agar or grain before shooting it into your entire production run. If it's clean, it's a rocket. If it's dirty, you just saved yourself a month of heartbreak. 3. Agar Plates …

5. Inoculation Station: Planting the Seed Without Screwing Up

You prepped your substrate. You picked your fighter—Ganoderma, Pleurotus, whatever. You survived the contamination warfare. Now you're standing at the altar, ready to introduce your culture to its food. And this is exactly where 70% of beginners eat dirt. Not because inoculation is hard. Because it's boring. It's tedious. It's the part where your brain goes, "Yeah yeah, I got this, let's just dump it in and—" No. Stop. You don't "just dump it in." You're performing surgery, chief. You're taking a living organism and transplanting it into a new body. You screw up the incision, the patient dies. You screw up the dosage, the patient dies. You screw up the environment during the procedure? The patient dies AND the replacement organs are already rotting. Inoculation is where your discipline gets tested. Not your knowledge. Not your equipment. Your discipline. Because everything you need to do here is simple. It's just not easy to do it correctly every single time. Still with me, or you zoning out already? Good. Let's talk about how to plant the seed without nuking your entire operation. Core Carnage (Rip Apart the Essentials) The Transfer: Culture Meets Substrate Here's what's actually happening when you inoculate. You have a pure culture—living, growing, hungry. You have a sterilized substrate—clean food, no competitors. Your job is to get the culture INTO the substrate without inviting a single uninvited guest along for the ride. That's it. That's the whole game. The culture comes in one of two forms: Liquid Culture (LC): Mycelium suspended in a nutrient broth. Looks like cloudy water or those little jellyfish-looking floaters in kombucha. This is your fast-track ticket. Liquid culture spreads through substrate like gossip in a small town—fast, thorough, hard to contain once it starts. Grain Spawn: Mycelium that's already colonized a grain substrate (usually rye, millet, or sorghum). Looks like a jar of grains held together by white webbing. This is your heavy artillery. Slower to spread initially but carries more momentum and food reserves. 💡 Pro Tip: Liquid culture gives you speed and even distribution. Grain spawn gives you vigor and resilience. If you're working with sawdust-based substrates for packaging, liquid culture is generally your go-to for fast, even colonization. Grain spawn works too, but you're adding grains into a sawdust mix, which changes your material properties. For mycelium packaging specifically, you're typically working with liquid culture inoculated into a sawdust-hemp hurd-corn stalk substrate blend. That's your battlefield. Know it. The Inoculation Rate: How Much Is Enough? This is where beginners get highkey delusional. They think a little bit of culture goes a long way. And technically, yeah, it does—eventually. But "eventually" isn't a business model. Your inoculation rate is the …

6. The Incubation Chamber: Environmental Control or Chaos

You sealed those bags like a pro. Inoculated 'em clean. Patted yourself on the back. Now you're staring at a shelf full of potential, thinking the hard part's over. Cute. Real cute. You just planted a living, breathing organism into a sealed container full of food. What happens when any living organism gets locked in a box with unlimited grub and no ventilation? It eats. It breathes. It generates heat. It dumps waste. Welcome to the incubation chamber, chief. This is where dreams go to die or multiply. This is where you stop being a lab technician and start being a landlord. You're managing tenant conditions now. And your tenant? Highkey demanding. Wrong temperature? It sulks. Wrong humidity? It stalls. Too much CO2? It suffocates. Still with me, or you zoning out already? Good. Because this chapter separates the hobbyists from the hustlers. We're building the exact conditions where your mycelium thrives and every competing mold dies a miserable death. Core Carnage (Rip Apart the Essentials) The Holy Trinity: Temperature, Humidity, Airflow Your mycelium needs three things to colonize that substrate. Screw up any one of them and you're growing science experiments, not packaging material. Temperature: The Goldilocks Zone Listen up. Mycelium isn't human. It doesn't care if you're comfortable. It cares about ITS metabolism. Most strains you'll work with; especially Ganoderma (The Tank) and Pleurotus (The Speed Demon) thrive between 70-80°F (21-27°C). That's the metabolic sweet spot where hyphae branch aggressively, chewing through your substrate like a chainsaw through butter. But here's what the slackers don't tell you: mycelium generates its own heat. Yeah. You read that right. As it colonizes, respiration cranks out BTUs. A densely packed incubation shelf can run 5-10°F warmer than your room temperature. So if your ambient hits 82°F? Your bags are cooking at 90°F+. And at 90°F? Your mycelium doesn't just slow down. It STRESSES. Stressed mycelium weakens. Weak mycelium loses to contamination. ⚠️ Common Mistake: Setting your room thermostat to exactly your target colonization temperature. You're not accounting for metabolic heat. Set the room 3-5°F BELOW your target and let the bags warm themselves. Ganoderma likes it warm. 75-85°F. It's a tropical strain, remember? This beast evolved in hot, humid forests. Cold rooms make it sluggish. Pleurotus is more forgiving. 65-80°F. But push it past 85°F and even The Speed Demon turns into a sloth. Humidity: The Moisture Matrix Your substrate already has moisture. You hydrated it during substrate prep. But the incubation chamber? That needs its own humidity control. Here's why: Your bags or containers likely have filter patches. Those patches allow gas exchange. And with gas exchange comes moisture loss. Slow, steady, invisible moisture loss. Drop below 50% ambient humidity …

7. Shape the Future: Molding and Forming the Goods

You ever watch a grown adult try to stuff ten pounds of wet, colonized sawdust into a tiny plastic box, slam the lid shut, and wonder why it never dries, grows zero structure, and rots into a stinking puddle of wasted time? Yeah. Welcome to molding day, where half the rookies lose their minds and all their product because they think "shaping" is just playing with Play-Doh. You survived the Incubation Chamber. You beat the contamination warfare. Your substrate is fully colonized, white, and looking like a block of pure potential. But right now? It's just a brick. A useless, rectangular brick. You can't ship a wine bottle in a brick, chief. We need to turn that raw, living mass into an actual product. A bottle shipper. A cooler insert. A protective corner block. This is where the science gets physical. We are talking molds. Geometry. Density. Timing. You mess up one of these, and your beautiful, living mycelium turns into a deformed, mushy disaster. Pay attention. I am not repeating this. Core Carnage (Rip Apart the Essentials) The Mold Itself: Your Product's Skeleton Listen to me closely. The mold you choose is not just a container. It is the skeleton of your final product. You cheap out here, you lose everywhere. Material Choices: You have three main streets to walk down for mold materials: 1. Plastic (3D Printed or Thermoformed): This is the golden child for beginners and scalable ops alike. PLA or PETG 3D-printed molds let you prototype weird geometries without remortgaging your house. Thermoformed plastic (vacuum-formed sheets) is what the big boys use for mass production. Smooth surfaces. Easy to clean. Easy to sterilize. The catch? Plastic is non-porous. That means moisture gets trapped. If your mold has no ventilation, you are basically waterboarding your mycelium. It suffocates, pools water, and invites contamination. Every plastic mold needs vent holes or breathable mesh inserts. 2. Wood (Pine, Plywood, MDF): Wood breathes. That is its superpower and its curse. It absorbs moisture from the substrate, which can help drying times. But unsealed wood is a contamination sponge. It harbors bacteria, mold spores (the bad kind), and moisture pockets. If you use wood, you seal it. Food-grade wax, epoxy resin, or polyurethane. Then you sanitize the living hell out of it every single cycle. MDF? Forget about it. It breaks down under repeated moisture exposure. Pine is cheap and works if sealed right. 3. Silicone: Highkey the best for complex shapes and fine details. Flexible. You can peel it off the finished product like a banana. Non-porous, easy to sterilize. Downside? Expensive as hell for large runs and doesn't breathe at all. You need venting strategies baked into the design. …

8. Done or Dead: Reading Colonization Completion

You ever stared at a grow bag like it owes you money, wondering if the white stuff creeping across the top means you're weeks away from a finished product or just days away from garbage? Yeah, we've all been that clown. Welcome to the most expensive guessing game in mycelium work — eyeballing completion like a rookie gambler counting cards at the blackjack table. Here's the brutal truth, chief: misreading colonization is how you end up with packaging that crumbles like a cheap cracker. Or worse — you wait too long and your material starts pushing out mushrooms. Actual mushrooms. On a packaging block. Congratulations, you just grew the wrong product. Let's end the guessing. Today. Core Carnage (Rip Apart the Essentials) Still with me, or you zoning out already? Good. Because this is where the money lives or dies. The Surface Lie Here's what trips up every single beginner: you look at your molded substrate, see white fuzz covering the entire surface, and think "DONE." You pat yourself on the back. You post it on Instagram. You start planning your sustainable packaging empire. You're highkey delusional. What you're seeing is surface colonization. The mycelium — remember those hyphae we talked about back in "Meet the Beast: Mycelium Unfiltered"? — has done exactly what it does best: raced across the easiest available food source. The surface of your substrate has oxygen, it has accessible nutrients, and it has minimal resistance. So the mycelium pavement-paves that real estate like a developer gentrifying a neighborhood. But underneath? Inside the core of your molded form? Could be a ghost town. Could be raw, uncolonized substrate just sitting there like an uninvited guest at a party. ⚠️ Common Mistake: Judging colonization purely by surface coverage. Surface white does NOT equal structural readiness. You're not making a marshmallow, bro — you're building a unified biological composite. If the core is raw, the whole thing fails. Surface Growth vs. Deep Core Colonization — The Real Difference Let's break this down like a bar tab after a bender. Surface growth is the mycelium's first land grab. It's fast. It's flashy. It's that white film that appears within days of inoculation, spreading like gossip in a small town. The mycelium is consuming the easiest-to-reach food and establishing dominance over the exterior real estate. Deep core colonization is the slow, grinding, unglamorous middle finger to impatience. This is where hyphae have to push deep into the substrate matrix — threading through sawdust particles, working around hemp hurd chunks, weaving between corn stalk fibers. It's harder. It's slower. It requires the mycelium to break down more complex carbon sources using enzymes it produces on-demand. Think of it like a city. …

9. Kill It and Keep It: Deactivation and Drying Protocol

You spent eight chapters building this beast. You fed it. You babied it. You fought off green mold like your life depended on it. You watched the hyphae network spread, you read the colonization signs, and now you're holding a fully formed block of mycelium packaging. Beautiful. Congratulations. You officially made a thing. Now here's the gut punch: if you set that thing on a shelf right now, it'll eat itself alive. That's right. The monster you built is still breathing. It's still hungry. And given the chance, it'll fruit right through your carefully molded shape and ruin every ounce of commercial value you just spent weeks creating. Still with me, or you zoning out already? Good. Because this is where amateurs get cocky and winners get paid. You're about to learn "The Kill" we teased back in Chapter 8. This is deactivation. This is where you murder your creation so it can live forever as a product. Dark? Yeah. Necessary? Absolutely. Core Carnage (Rip Apart the Essentials) Your mycelium packaging is alive. Let that sink in. The chitin and branching structures that give your material its strength? That's a living organism. The network is intact, the cells are metabolizing, and if you skip the next step, you're not making packaging. You're making a mushroom farm. And not the profitable kind. Deactivation is the act of killing the mycelium while preserving the structural integrity it built. You're locking in the material properties. You're slamming the brakes on metabolism. You're telling every cell in that block, "Party's over. Go to sleep forever." There are two ways to murder this beast, and both involve heat. Because biology is stubborn, and only temperature swings drastic enough will guarantee a clean kill across the entire material. Method 1: Heat Drying (The Slow Cook) This is the budget-friendly approach. You take your fully colonized form and you expose it to sustained heat in the 150°F to 170°F range (that's roughly 65°C to 75°C for the metric squad). The goal is twofold: kill the organism and drive out moisture simultaneously. Here's the science, stripped bare. Mycelium cells die when their internal proteins denature. That's a fancy way of saying the heat scrambles their cellular machinery like eggs in a pan. Once those proteins unfold and tangle, the cell is dead. No recovery. No regrowth. Done. But here's the trap. Heat drying at these temperatures takes time. A lot of it. We're talking 8 to 24 hours depending on the thickness of your form, the density of your substrate, and how much moisture you started with. And during that entire window, you're burning energy. ⚠️ Common Mistake: Pulling your material out early because the surface feels dry. …

10. Proof of Work: Testing Quality Without a Lab

You grew a living organism, shaped it, baked it alive, and dried it out. Congratulations, dreamer. You've got a piece of dead fungus shaped like a bottle holder. But if you think that lump of chitin and branching is ready to protect a $200 bottle of bourbon in transit just because it looks solid, you're highkey delusional. You don't have a product yet. You have a hypothesis. Today, we test that hypothesis in the streets. You've survived the sterile or die contamination warfare. You mastered the kill in deactivation and drying. You read the colonization like a pro. But none of that matters if your final product crumbles like a cheap cracker the second it faces the brutal, unforgiving reality of a shipping truck. We don't do "vibes-based" quality control here. We do proof of work. You ain't got a $50,000 universal testing machine? Cool. Neither did the legends who built empires out of scrap. We're going full MacGyver on this. Grab your work boots, chief. Time to see if your mycelium is actually a beast, or just a fragile little snowflake. Core Carnage (Rip Apart the Essentials) You want to know if your material can hang with the big boys? You gotta beat it up. You gotta drown it. You gotta drop it. Then you gotta look at the carnage and ask, "Why did it break?" 1. The Crush Test (Compressive Strength) Packaging has one job: take a beating so the product inside doesn't. If somebody stacks three boxes of wine on top of yours, does your mycelium hold, or does it collapse like your motivation on a Monday morning? The Lab Way: Put a sample on a compression platens machine, press down at a constant rate of 2mm per minute, and measure the exact force (in kilopascals, kPa) until it deforms by 10% or shatters. The Street Way: Get a bathroom scale. Yeah, the dusty one in your bathroom you avoid stepping on. Place your mycelium sample flat on the scale. Put a flat piece of wood on top of the sample. Now, start stacking weight on that wood. Dumbbells. Bricks. Gallons of water. 💡 Pro Tip: Weigh your individual bricks or water jugs beforehand. One gallon of water is roughly 8.34 lbs (3.78 kg). One standard red brick is about 4.5 lbs (2 kg). Know your ammunition. Watch the scale. Watch the sample. The second you hear a crack, or the second the sample visibly compresses and doesn't spring back, stop. Note the weight on the scale. Divide that weight by the surface area of your sample in square inches. Boom. You just calculated a rough compressive strength in pounds per square inch (psi). The Baseline Check: …

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