Keyboard mylar processing

[jmdlcar]

Don't throw away the boards you cut the finger off cause most have gold under the green solder mask.

Jack

 

[kjavanb123]

Jack,

Thanks for your advise on green boards.

Update on project, after addition of hcl to filtered solution of copper nitrate white silver chloride preciptiated boiled it in distilled water going from this


To this

 

[kjavanb123]

Tried to convert silver chloride produced from keyboard mylars to metal silver using addition of zinc into dilute sulfuric acid and mix with the silver chloride, here are the photos

Silver chloride after being rinsed in hot water


Silver metal


Side view


On the same topic, what is the fastest methods to recover silver from the keyboard mylars on large scales, mqybe around 20 lbs a week.

Regards
Kevin

 

[kjavanb123]

I got 8 grams more silver on top of 2.2 grams which was melted. So from 700 grams keyboard mylars so far 10.2 grams of silver metal was recovered. Keep you posted.