Traditionally, prints are described as what they are made of, and then how they are printed, and finally what they are printed on. Like "silver gelatin contact print on Varycon", however, that is much more appropriate for a gallery or museum than a local market. Almost nobody will know what the heck you are talking about. Fewer will care. The first and foremost lesson of marketing is not to market to yourself. Market to your customer. People out shopping for whatever will buy because they like the print. If they find satifaction in the method, so much the better, but the prints that sell are the ones people relate to, or find interesting, or beautiful. Art is in the breast, not the brain.