Comment by belval
19 hours ago
For me the next step should explore how to cut out the firing part of the process altogether, pottery looks cool but the process requires a lot of energy. Perhaps it could be done on a piece of wood planed by hand? You can get those fairly flat. Then use copper tape (or laminate your own copper really) with some homemade adhesive?
Actually now that I think about it you could just make pine rosin (pine resin + alcohol) as your adhesive. For the copper laminate this might be harder without steel rollers or a way to cut.
Amusing historical note, that's where the word "breadboard" came from. Wooden cutting boards were readily available, and people would make circuits by screwing down tube sockets and other components.
Dredged from memory is the "phenolic" circuit board, popular before about 1990.
https://picamfg.com/pcb-base-materials/ "FR-2: Phenolic Resin with Paper Reinforcement" / https://epra.eu/en/sustainability/bio-sourced-and-bio-based-... - you could make an entirely natural-derived paper+resin circuit board, with high dimensional stability, and validated by real use.
The only downside is it's not inherently fire resistant.
For what it’s worth, these can be fired in a campfire! No kiln or anything necessary.