Collodion prints were made from a negative and on either a glossy, coated paper support (between the late 1880s - 1920s), or on a matte, coated paper support (between 1894 - 1920s). The coated paper support for Collodion prints also utilized the POP method and possessed a 3 layered structure, instead of the usual 2 layers. Some characteristics of note include: an overall sepia, or purple color, and a subtle rainbow effect on their surface of the glossy collodion print when viewed under fluorescent lights. A matte Collodion print on the other hand, can be characterized by an over all gold, platinum, or black color. In general, Collodion prints are very stable, and only in rare cases do they fade. However, the surfaces of these photographs are easily abraded, and consequently they are usually mounted. Due to the third layer in the structure of the photograph, the paper fibers are not usually visible (Northeast, “5.2 Types of Photographs.”).