In most cases, narrow control of RH level (minimal fluctuations) is very important.

ARMS, ARMOUR, METALS 15-40%
BOTANICAL OBJECTS, DRIED PLANTS, SEEDS 40-60%
COINS, NUMISMATIC COLLECTIONS 35-40%
ETHNOGRAPHIC BARK, CLOTH, BASKETRY, MANILLA, SISAL, MASKS, FEATHERS, LEATHER GARMENT 40-60%
FURNITURE, MARQUETRY 40-60%
GEOLOGICAL MATERIAL 45-55%
GLASS (crizzled) 40-60%
INSECTS, DRIED AND MOUNTED 40-60%
IVORIES, BONE CARVINGS 50-60%
LACQUER WARES 60-70%
LEATHER, SKINS, BINDINGS 45-60%
PARCHMENT, VELLUM 55-60%
PAPER 40-50%
STRETCHED PAPER 45-55%
PHOTOGRAPHS, FILMS 30-45%
PAINTINGS ON CANVAS 40-55%
PAINTINGS ON WOOD, POLYCHROME SCULPTURES 45-60%
PAINTED, VARNISHED WOOD, VARIOU 45-60%