Which plastic is recommended for beginners to melt and why?
HDPE (marked with a #2) is preferred β it melts cleanly for molding and is easy to identify. If unmarked, use a float test: polyethylene/polypropylene float; if it dents itβs polyethylene (HDPE).
What's the fastest way to remove stubborn label adhesive?
A heat gun to warm the adhesive and peel the label off is quick and effective; solvents like acetone or WD-40 work but can be slower or costly at scale.
How can you minimize air bubbles and get a smooth molded piece?
Heat and fold/twist to release trapped air, melt colors separately to avoid overworking, then apply high, consistent pressure (e.g., bottle jack press) and check pressure during the cooling shrink.
Is melting HDPE hazardous to health?
Melting HDPE (not burning) is safe with proper ventilation. The main hazard is burning residues (adhesives, food), so thorough cleaning and open-air ventilation are essential.
How should recycled plastic products be priced?
Factor in time for collection, sorting, cleaning, shredding, and finishing. Determine a target daily income and divide by output, and highlight the eco-story to justify pricing.