Description of what it is like

Plastic refers to a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. They are typically lightweight, waterproof, and can be molded into almost any shape when soft, then set into a rigid or slightly elastic form.

Origin and where to find it

• Synthetic: Most plastics are derived from petrochemicals (oil, natural gas).
• Natural analogs: Rubber (latex), horn, shell, and tortoiseshell are natural polymers that behave similarly.
• Scavenging: In a post-collapse scenario, plastic is a non-renewable resource found in ruins, landfills, and oceans.

Minimum processing required

• Recycling: Thermoplastics can be melted and remolded.
• Cleaning: Must be cleaned of contaminants before melting.
• Sorting: Different types (PET, HDPE) must be separated as they have different melting points and properties.

Tools needed to work on it

• Heat Source: Controlled heat (oven, hot plate) to soften without burning.
• Molds: Metal, wood, or silicone molds to shape the molten plastic.
• Cutting: Saws, knives for shaping solid plastic.
• Ventilation: Essential to avoid toxic fumes when melting.

Common forms of use

• Containers: Bottles, buckets, waterproof storage.
• Cordage: Synthetic ropes (nylon, polypropylene) are stronger and rot-resistant compared to natural fibers.
• Insulation: Electrical wire coating, thermal insulation.
• Parts: Gears, handles, clips.

Possible substitutes

• Containers: Clay, Glass, metal, gourds.
• Waterproofing: Waxed fabric, tar, gut.
• Moldable parts: Horn, bone, wood.

Limitations and common failures

• UV Degradation: Becomes brittle and cracks when exposed to sunlight over time.
• Heat: Melts or deforms at relatively low temperatures compared to metal or pottery.
• Chemical Sensitivity: Some solvents (acetone, gasoline) dissolve certain plastics.

Risks and safety

• Fumes: Burning plastic releases toxic smoke (dioxins, furans). Always melt in a well-ventilated area.
• Microplastics: Break down into tiny particles that contaminate water and food.
• Fire: Highly flammable; once ignited, it is hard to extinguish and drips burning liquid.