ABSTRACT
This chapter explains the steps to make a good platinum print first, and then addresses the gumover. The combination of gum and platinum is a rich marriage between two processes. A simple gum layer over a platinum print adds depth, gloss, and a hint of color. In this case platinum remains the primary voice of the print. Then again, gum can also be printed in combination with platinum in duotone, tricolor or quadcolor work. In this case the platinum layer functions as the skeletal framework of the print, providing rich darks or blacks while gum remains the primary voice. Platinum is a bit paper-picky like cyanotype. The best papers on the market to date are Hahnemhle, Bergger Cot 320 and Arches Platine. Fabriano Artistico paper works adequately for gum over platinum prints. The best brush for platinum printing is a 2 flat synthetic fiber brush. The clearing step removes iron salts. There are acid clears and alkaline clears.
