Homebrew_PCBs

In article <ilb297+bk6u@...>,
jmelson2 <elson@...> wrote:

> --- In Homebrew_PCBs@yahoogroups.com, lists <Stuartlists@...> wrote:
> >
> >
> > 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?
> >
> Don't really know. It wasn't very obviously slower, though. About one
> minute in the fixer at a 1:4 dilution, and all the white was gone. I
> left it in for two minutes just to be sure the fixing was completed.

Ok, just curious.

--
Stuart Winsor

Midland RISC OS show - Sat July 9th 2011