Thank you for your interest in my photographic prints. The photographic material I use is Duraflex. It is a glossy RC color print emulsion coated on a 9 mil thick polyestar base. It is similar to Ilfochrome, which you may be more familiar with. It is more durable than normal photographic paper and provides a brilliant, glossy surface which is perfect for the slot canyon photos as well as the others. It is a more costly process but produces a superior print to C process prints.