These enclosures make photographs last longer because they protect from light, dust, and handling.
Paper has advantages for storing photographic materials.
Its opacity protects images from light. However, items must be removed to be seen, increasing the chance of mishandling and abrasion. A soft, smooth paper can be used to interleave photographic prints that are not placed in individual sleeves to protect the surface. Board, like paper, can be manufactured to be free of acids. Lignin-free board is recommended for storage of photographic materials because of its greater purity.