Ware's Cyano On Pot ... Instead of NH4 Dichromate

[Michael Koch-Schulte <mkochsch@shaw.ca>]

Maybe someone with experience could answer, or possibly a chemist. Would it
matter when formulating Ware's Cyanotype to use Potassium Dichromate instead
of Ammonium Dichromate? My understanding is that Ammonium Dichromate is used
only as a preservative. Would the K in Potassium Dichromate crystalise out
in a similar manner as the Potassium Iron (III) Oxalate does? Or would I be
left with an excess of K ions in the mix? My question amounts to: can
Potassium Dichromate be used as a substitute when Ammonium Dichromate is not
immediately available.

~m