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Update on Sylgard 184
I tried the method I suggested using two 8" watch glasses. It worked well, except that it's difficult to control the lowering of the watch glass. I would suggest instead that if the CRT can be supported face down, to raise the lens up to it using a lab jack.
I also made a mistake in my message to JB5pro. When I estimated the volume needed I did pi*d**2 instead of pi*r**2 for the area. I was a factor of 4 too high.
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