Solution for printing with water soluble PVA in Dualstrusion
by robosavvy, published
The filament is to be contained in a airtight connector that only exposes the filament to ambient moisture for a few seconds before it is extruded.
More information at: robosavvy.com/forum/viewtopic.php?p=37534#37534
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A small heater inside (low watt light bulb) could help out, though it sounds like it's working nicely as-is. You'd have to keep the heat from warping the filament though, so it would probably mean a larger container is needed.
I think sciencemike's solution should work just fine concerning the small leakage. He putted some desiccant packages in the container to remove moisture actively.
I like where you are going with the idea and yes the original seal on the box is very large and if it does not use an oring then that would be a pretty massive source of humid air. The problem you are trying to solve is one that desperately needs solving. So I wish you all the luck.
Grab a sensirion humidity module and plug it into one of your arduino boards, throw a small display outside the box and have it datalog or just remember highs and lows, that should be doable for under 30 $. Goodluck.
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