What I meant was that if a particular solution (say a carbro
sensitizer) specifies the use of ammonium dichromate, it is possible to
get the same printing characteristics by substituting 117 units pf
potassium for every 100 of ammonium. I do mean that in terms of units
of dry powder to any given amount of water. As I said, I know from
experience that this formula works fairly well but have
no idea as to exactly how precise it is.
Since I posted this message Peter sent along some information about
dichromate solutions that seems much more scientific.
"You would get equal concentrations of dichromate in solution by taking
10.00 g of sodium dichromate or
9.87 g potassium dichromate or
8.46 g of ammonium dichromate."
Although expressed differently than my 100 units of ammonium to
117 of potassium dichromate I think we are saying the same thing.
Sandy King
Sanking@hubcap.clemson.edu