Hi everyone!
Ive been processing CR39 prescriptions for the last 5 years and now want to set up a Poly Rx process line. Ive been having problems with the processing of Poly and need some advice on the following :-
The tools that are in use now are cut in .12 steps with an index of 1.498. These tools always give an error in the final Rx while processing Poly. Ive tried all the formulas and calculations that were provided and also some calculators that i had downloaded but havent had any real success. Im sure that ive been making mistakes somewhere but dont know where . Ive decided on cutting a separate set of tools for Poly and need advice on wether i should cut the tools in .10 steps on an index of 1.530 because the front curves are calculated on 1.530 by the blank supplier. I additionally would like to also surface mid index lenses on 1.56 and in future hi-index. Could someone tell me what would be the best tooling steps and in what index would help me in surfacing Poly, mid and hi-index materials?
Another problem ive been facing is cleaning of Poly after surfacing. I presently use Acetone and while using Acetone on Poly the surface scratches. Also while hard coating id like to know what is the acid to be used for etching. We currently use NaOh for Cr. Also i use a 1.55 index Hard Coating solution for CR. I wanted to know if the same can be used for Poly. Coating Poly with the same solution looks okay but i dont know what the effects would be after say 6 months ofuse.
I know most of you people out there have been processing Poly. Please forgive me if the questions asked above are silly but im in need of help especially from the many Gurus like Daryll Harry and others.
Thanks in advance:)
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