Originally Posted by
mrmylar
You would have a big mess and very little silver recovered, if any at all. The first mistake would be shredding them.
What I meant to add is that when using shredders, mills and other devices that causes friction WILL make the mylar/plastic melt and stick to each other and you'll have trapped silver in the melted plastic.
I've been there and done that! It will not work.
I can understand your reluctance, but forums are for sharing.
I've done a lot of process's that required the use of abrasives, my first experience with a lapping compound to lap in valves on an engine, then I had a commercial sandblasting company, did lapidary as a hobby then used abrasives to remove gold from RAM boards.
I ran the mill dry but one could add water which would act as a lubricant, the mill runs at such a low speed there is no heat build up.
A paper shredder would eat mylars for breakfast all day long and the best part is that you would not have to separate the blank sheets from keyboard mylars. For every 20 pounds of shredded mylers you have in the mill one pound of abrasive should suffice.
In fact you may not even need to use an abrasive, the sharp edges of the shredded mylars tumbling with a bit of water may be enough to wear off the silver. There are instances in sandblasting that plastic media is used.
This guy is using plastic blasting media to remove paint from a car. for those of you that have an excess of scrap plastic it maybe a good idea to turn your waste into blast media.
Anyhow I'll leave it up to the forum members to decide which of us is able to separate the chaff from the wheat.
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