In message , Andrew Gabriel
writes
Food trays can be a nightmare to recycle.
Plastics which can be cooked in, and film covers which are strong,
thin, transparent, and airtight, result in mixtures which can't be
separated for recycling, and contaminate other recycled plastic.

But the little black pots that rice puddings and other hot-uppable
deserts come in are ideal for mixing epoxy etc. in. Clear plastic
packaging is generally hopeless because it dissolves.

Why would anyone want to send them away for inept recycling?
--
Bill