thegardendude 🏳️‍🌈🏳️‍⚧️🇵🇸 on Nostr: Interesting. I would think the problem would be cardboard coated in that thin waxy ...

Interesting. I would think the problem would be cardboard coated in that thin waxy material, and/or cardboard with a lot of lettering and graphics on it (the ink). I haven't seen any negative effects from plain cardboard in the few times I've used it so far.