I came across this 'forgotten' Pdf. that could be shared further with any of the members interested in the alternative print processes
I'm not 'sure that this is the complete file.. of not... drop me a note of to 'where' you can get 'at it'
A NON-SILVER MANUAL
Cyanotype,Vandyke Brown, Palladium & Gum Bichromate
with instructions for making light-resists including pinhole photography
Sarah Van Keuren