I'm working on a solar dehydrator based on one at Wheaton labs in Montana. Does anyone have a natural paint recipe for black paint? I would like the solar collector downstream of the food to have no gick off gassing. I'm thinking of crushing charcoal up into powder and using a binder such as oil or eggs. Any thoughts? 

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https://image.nostr.build/1e7766959d287f75c54b4f08483729227ea05bcea6b256929dc951673e5a0d90.jpg