Many practitioners have abandoned platinum and only use palladium. A greatly decreased susceptibility to deterioration compared to silver-based prints due to the inherent stability of the process and also because they are commonly printed on 100% rag papers.However, platinotypes that have been waxed or varnished will produce images that appear to have greater D-max than silver prints. Recent studies have attributed this to an optical illusion produced by the gelatin coating on RC and fiber-based papers. The darkest possible tones in the prints are lighter than silver-based prints.Not being coated with gelatin, the prints do not exhibit the tendency to curl.The reflective quality of the print is much more diffuse in nature compared to glossy prints that typically have specular reflections.Some of the desirable characteristics of a platinum print include: It is estimated that a platinum image, properly made, can last thousands of years. The platinum group metals are very stable against chemical reactions that might degrade the print-even more stable than gold. Platinum prints are the most durable of all photographic processes. As a result, since no gelatin emulsion is used, the final platinum image is absolutely matte with a deposit of platinum (and/or palladium, its sister element which is also used in most platinum photographs) absorbed slightly into the paper.
Unlike the silver print process, platinum lies on the paper surface, while silver lies in a gelatin or albumen emulsion that coats the paper. Platinum tones range from warm black, to reddish brown, to expanded mid-tone grays that are unobtainable in silver prints. Platinum prints, also called platinotypes, are photographic prints made by a monochrome printing process involving platinum. Coming Home from the Marshes, platinum print by Peter Henry Emerson, 1886
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