Well… pretty much all plastics shed microplastics, it’s a matter of how much. Scratching, rubbing, heating without melting, or starting with loosely packed fibres… accelerate the process.

There’s estimates that weekly we ingest enough microplastics to make a credit card, which is truly dystopian. I wonder how much more it was during my ballpen cap chewing phase. All the variety of compounds used to manufacture them, under more or less control, are a Pandora’s box of possible issues.