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From: neighbor@csd4.milw.wisc.edu (Jeffrey Alan Ding)
Newsgroups: sci.electronics
Subject: Re: PC board photo etching kits
Message-ID: <2409@uwmcsd1.UUCP>
Date: Fri, 3-Jul-87 01:45:46 EDT
Article-I.D.: uwmcsd1.2409
Posted: Fri Jul  3 01:45:46 1987
Date-Received: Sat, 4-Jul-87 11:10:57 EDT
References: <2392@uwmcsd1.UUCP> <10524@sri-spam.istc.sri.com>
Sender: news@uwmcsd1.UUCP
Reply-To: neighbor@csd4.milw.wisc.edu.UUCP (Jeffrey Alan Ding)
Organization: University of WI-Milwaukee
Lines: 19
Keywords: PC boards,GC electronics

In article <10524@sri-spam.istc.sri.com> jeffr@sri-spam.UUCP (Jeff Rininger) writes:
>	I've had problems with sensitizing my own boards; the problems
>	were caused by spraying the photo-resist on the board too thick.
>
Too thick??  Is one coat too thick?  I tried it with 1 coat, 2 coats, and even
3 coats.  the one with the 3 coats seemed to work best.  Even on the
instructions it suggests that more that one coat works better.  One thing
strange...  The color of the PRE-sensitized boards were a different color
than the one I sensitized.  Does that have any factor????


>	For one-offs, why not use Stahler mills (which I've hyped on this
>	newsgroup before) and spare yourself all the etching hassle ?

What is Stahler mills????  I've never heard of that before...  Could you
please explain.  The only way I know of making a PC board without etching
it is wire wrapping or using copper stick on's.

Neighbor