Prussian (Berlin) Blue vs Turnbull Blue in Cyanotype

Hello,

I'd like to try reversal (positive) cyanotype which gives Prussian Blue (ferric ferrocyanide). Before ordering potassium ferrocyanide I would like to ask you guys how Prussian blue compares to the common (negative) cyanotype Turnbull blue (ferrous ferricyanide).
Is it colder, deeper, ... ?

Thanks,

Philippe
Received on Wed Nov 5 09:12:35 2003