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Would “rock wool” work to filter the gold foils from an electrolysis stripping cell operation?
 

Paper filters are no good…

  • 3 weeks later...

Regarding simple sulfuric acid either concentrated or even 25% v/v or stronger, I use glass wool. Packed in a plastic funnel, using gloves as the wool can cut into your skin and irritate.  But the sintered glass funnel above is a neater/cleaner approach. 

Edited by noquacks

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