Homebrew PCBs

In article <il9rbf+r6fe@...>,
   jmelson2 <elson@...> wrote:
> > > It's quite an interesting phenomena. 
> Well, the problem is SOLVED!  After MUCH calling around, I found the
> local graphic arts distributor, Xpedex, had a developer and fixer that
> they recommended for this film.  It is their own brand, not Kodak. 
> Well, it works!  I didn't have time to fire up the photoplotter, but
> just partially fogged a snip of film with the red LEDs of my darkroom
> timer, developed it, then rinsed it and fixed it, and immediately I
> could see a difference, the unexposed part of the film slowly faded from
> white to clear, rather than to what looked brown under the safelight. 
> When fully fixed and then washed, it is totally clear in the unexposed
> part.

Excellent!

> This "fixer" obviously has acetic acid in it, you can smell it
> immediately when you open the bottle.  So, I guess it is really stop
> bath plus fixer.

Yup, most fixers in use are "acid-hardening".

Is it "slower" than the fixer you were using previously, which might
suggest Sodium rather than Ammonium Thiosulphate?

-- 
Stuart Winsor

Midland RISC OS show - Sat July 9th 2011