Photo corner mounts for albums, center and lower right. Avoid envelopes with the seam down the center and avoid seals using animal or vegetable glues. They are also available in triacetate, polyester or polypropylene. Albums tend to be the most popular storage medium. Archival storage albums, although more expensive than conventional albums, are available at most archival suppliers and dealers.
Plastics are one of the safest materials to use in direct contact with photographs.
However, some plastics contain additives to strengthen plastics or make them more pliable, etc. A number of materials often used in the storage of negatives and prints are detrimental to the photographic image and its support. Among the materials known to be detrimental to photographs are wood and wood products such as plywood, hardboard, chipboard, low-grade paper, glassines and strawboard. There are also some concerns with the use of chlorinated, nitrated formaldehyde-based plastics, lacquers, enamels and materials that contain plasticizers. Pressure sensitive tapes and mounting materials, as well as acid inks and porous tip marking pens that use water-base dyes should also be avoided.