Auto labeling feature to improve recycling of waste prints

[JAngerCAN]

One problem with trying to recycle failed prints is reliably identifying what kind of filament a part is made of. Without a label recyclers are typically unable to attempt recycling and the print ends up in the landfill. As an enhanced new feature the slicer could automatically, and by default, apply a recycling label to the bottom of the part to be printed using the type of filament assigned to print that part. PLA, PETG, TPU, ASA, etc. Some additional implementation ideas:

• Generally no user intervention is required - parts are automatically labeled.
• Multiple parts each have their own symbol assigned.
• Different sized labels could be automatically selected depending on the part size.
• A single part made of mixed different materials (e.g. with an MMU) would be labeled as not recyclable.
• The end user can turn off the feature on a part by part basis as they prefer.
• End users can move where the label is located, the size, orientation, etc..
• If the label cannot automatically be put on the part bottom then a warning is raised when slicing.

I know Prusa slicer has the recycling symbols available in the gallery as modifiers. I don't think this gets much use.

I believe by labeling almost every part then recycling of 3dp waste plastic could become more achievable as a reliable source of identified & labeled plastic. Right now probably all or 99.9% of it ends up in landfills.