kurt@think.com (Kurt Thearling) (04/29/91)
I'm trying to get some information about photresist chemicals and was
hoping someone out there might be able to help. Specifically, what
chemicals are available and where can I get them?
First, I will be using this to etch zinc plates for printmaking rather than
coppper coated PC boards, but that shouldn't make much of a difference (at
least as far as the resist is concerned - but I will have to use a
different etchant).
So far I have found a (negative) photo resist made by the Datak Corp (in
Guttenberg, NJ) called ER-71. The electronics store I purchased the PR
from did not carry the Datak brand of PR developer so I bought what they
had, a PR developer from a company called Injecterol (stock no. D1-P). The
PRD bottle listed its ingredients as sodium carbonate solution. Well, I
treated (in a dark, but not completely dark, room) a number of plates with
the resist (varying the amount of PR used) and let them dry. I then
exposed the plates (covered by the image negative) under a photoflood lamp.
But nothing seemed to have happened. Out of the five plates I did, only a
small fraction of one of them seems to have had any of the image
transferred. Does anyone have any idea what went wrong?
I also have been told that the KODAK (now manufactured by the KTI corp)
brand of photo resist chemicals are good (KPR and KPR developer). Does
anyone have any experience with them?
Any information will be greatly appreciated.
kurt
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Kurt Thearling Thinking Machines Corp.
245 First Street
kurt@think.com Cambridge, MA 02142
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