Hi Alexis. I've made some of these over the years, but I found the 'trick', if you will, is to very lightly dust with baking soda. Most folks, I think, roll in baking soda with the glass almost molten. It picks up too much baking soda and so it continues to react with the glass for a very long time. I've got a couple that i kept that I've been wearing since the early 2000's that have never flaked or disintegrated. HTH
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ESC
Soft glass on a Minor/concentrator since 1996
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