Homebrew PCBs

It is difficult to know without knowing what potassium compound is
involved. (I understand "kali" means "potassium", but potassium isn't
purple). If "kali" is potassium permanganate, it is a powerful
oxidant, so perhaps this triggered polymerization or some other reaction.

As far as coloring, I have read that hobbyists who make models use
Future floor polish to clear coat their models. Some report that some
acrylic model paints seem to be compatible when they are dissolved in
it, and some don't. But I would be concerned about the size of the
pigment and the chance of blocking the inkjet, (the inkjet is
something the modellers don't use to apply so they don't have to worry
about pigment size). Your food coloring idea seems more likely to work.

Grant 

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> ok i will do the ethanol test.
> 
> but does nobody know why it gets in this jelly stage when mixing it
with floor polish?
> i had it only in the glass jar, perhaps 10 or 20 ml of floor polish
and only very few kali.
> after shaking everything was ok (and colored). then putting it down
on the desk, lid on, and writing 
> email (several minutes). after that i took it again and it was in
that jelly stage. it still is this 
> viscosity today.
> 
> regards
> stefan
> >