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% |