Some 40 years ago when I worked in an optical shop, we used acetone to "glue" broken eye glasses back together. It could actually stick together a pair of plastic frames that were broken at the bridge. Just stick the broken ends in acetone until they got really soft, and smash them back together. Gave people a way to wear their broken glasses while waiting for their new ones, and provided a much more stable temporary fix than tape. Probably not healthy to breath either the acetone or the fumes of the melding plastic, but who knew? And that was back when you could get a basic pair of eyeglasses for $12.50. Now that frames alone cost upwards of $150, nobody will even do a temporary repair.
That's progress!
sol

Marshall Dudley wrote:
You need to know your plastics. Acetone dissolves some plastics,........................ Glass frames are typically polystyerene with a plasticizer added I believe and would thus be attacked.



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