How about High Impact PolyStyrene (HIPS)? —It might actually fit the bill perfectly here!
(In fact, the local plastic fabrication shop here keeps it in stock by the sheet for various marine research project needs! [such as scuba diver’s clipboards, for example])
That was exactly what i was starting to look into, polypropylene filament. Chemically it should hold up indefinitely in that environment. PH range of 1 - 14 is what they claim anyways.This one is your friend...
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PP (Polypropylene) 3D Printer Filament 0.8KG | SUNLU Online Store
PP - flexible material characterized by its low density and lightweight properties, effectively reducing product weight while meeting food-grade safety standards - making it perfectly suitable for food-contact applications.store.sunlu.com
Polystyrene would be great too, but i dont have anything other than normal woodworking tools (no cnc router or mill) and was hoping to print all the intricate parts.


