This startling mechanism for promoting depolymerization relies on an additive that many plastics already contain: a pigment called carbon black that gives plastic its black color. Through a process ...

Another issue is many mechanically recycled products are brown or gray because it is hard to strip out the color ... looking into chemical recycling — meaning the plastic is stripped down ...

Researchers have discovered that carbon black in black plastic enables efficient recycling when exposed to focused light. The ...