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First of all IRstuff I 100% agree regarding the side conversations, this is why as Harold mentioned I started my response with: "Harold for some reason I was unable to find a way of responding to the answer you left." Getting on with the thread! I 100% got what I was looking for in the...

If a lens was designed for a material with a specific refractive index and the final material came up with a refractive index difference of + .04 how big an effect would it have on the lens performance. If ones uses the final material what kind of problems could this cause. Layman

That's correct pat it is a plastisol

I'm looking for some feedback on what is the fastest way to cure a flat piece of pvc gel. the options I see are. a. blow heat directly on top of it at max temp it can take b. teflon coated hot plate on top of it at curing temp. .040" thick 4" diameter circle of pvc gel. on a teflon coated...

Has anyone tried a household drinking water micro-filtration systems or slow sand filters or this, I also just found http://www.virginpacificwater.com/esf.html

I'm looking for sites or someone that can design and or cut elliptical lenticular embossing plates and would appreciate any help. Thanks Gary

I have tried vacuum forming! Only, I lose all the fine detail does anyone know of any pressure formers or pressure form themselves in the NY NJ or Conn area 14"x14" .050" rigid pvc. Thanks Gary