I have a number of rare, out of print alternative photography books for sale....... I will be adding to the large list as time goes on. "Photographic Emulsion Technique" by T.Thorne Baker Emulsion Formulas, images of a number of old coating machines for both film and paper, some with diagrams. Caracteristics of geletain, silver....This is a hard to find very rare informative classic. $125.00 Thrichrome Printing by the Autotype Carbro Process. A 35 page how to booklet with illustrations on colour seperations, 3 colour carbo printing using carbon paper transfers. $35.