Printing Gum over Salted Paper
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Printing Gum over Salted Paper book
The combination of gum bichromate and salted paper has barely been explored as gum has been in combination with cyanotype or platinum/palladium. Gum can add gloss, depth, and a hint of color by merely using the salt negative already created to print a layer of gum on top of a finished salted paper print. It can also be printed in more exacting ways to make a salted paper print duotone or full color. This chapter explains the methods that consider the digital negative process for printing gum in combination with salted paper. Sizing is necessary to prevent the pigment in the gum layer from staining the paper and muddying the highlights. It is done after the salted paper print is complete and before the gum print is started. Developing a print can be done in two ways. One is automatic development and the other is mechanical development.