XSRtiliry Posted March 22, 2010 Posted March 22, 2010 i have used ferric chloride for copper pcb boards, and have left the solution to sit for almost a year.. i have noticed the seperation of some kind of solid, leaving a translucent green fluid.. after seperataing the liquid from solids, and leaving the fluid to sit again for a long time i noticed green "spike" crystals along with small octagon "Clear" crystals.. there were many other crystals in the "paste"... what could they all be?? i have a collection of some of them...
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