Canson Infinity Edition Etching Rag - 310gsm - 36"x50' rollCanson Infinity Edition Etching Rag is a 100% cotton Fine Art paper with a smooth texture, reminiscent of the original genuine etching and printmaking papers. The paper has the purest white tone available on the market, without any Optical Brightening Agents, also called OBAs. Optical Brightening Agents are artificial brighteners that deteriorate in time. Canson Edition Etching Rag offers a high paper shade stability and a resistance to aging by using