How to Dissolve a Broken Watch Stem in Alum Powder

Hi Guys, a short video here. I show you how I manage to dissolve a broken watch stem from out of the crown using Alum powder. I have never attempted this before but heard many people have had success so figured I would have a go and film my progress. If you enjoy this one then please give a like and consider subscribing to my channel. Thanks.
Link to the alum powder I used, its very cheap: ebay.us/Omkccd
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