Youasked:
>I've been going through the last 2 years of the archives and haven't
>found anything about the different Dichromates for gum printing.
> Are Sodium
Very slow, do not bother with it.
>Potassium
Can only be dissolved to about 11% for a saturated solution si is slower than
ammonium if you are working with saturated solutions. It has the advantage that
it can be dissolved in alcohol which dries more quickly which can be important
if you are dichromating gelatine forn carbon prints.
> and Ammonium Dichromate
A saturated solution is around 33% so it is faster than the potassium. It will
not dissolve in alcohol.
> interchangable? Is one better
>suited for gum work?
Apart from the above potassium and ammonium dichromate are interchangeable.
>I see the Potassium variety refered to the most.
That is just force of habit.
>I've read Ammonium is more dangerous to use.
Only because a saturated solution is stronger. Don't breathe it, don't eat and
if you get on your skin wash it off straight away. Follow those simple guides
and it will be less dangerous than many things in the kitchen cupboard. But
remember thany chemical can be dangerous if misused even water.
>I'm just getting started and like some real world input.
Macy, welcome.
Terry King
Macy Garcia