
Optimal Presservation Parameter Table:
| relative humidity RH% | Optimal preserved articles |
| 50%-60% | Books ,antiques,cultural relic,calligraphy and painting,coin,CD, engineering drawing , Fax paper,printing paper |
| 40%-50% | lens,cameras,videocameras,telescope,microscope,disk,tape,photo, negative,slide,fiche,audiotape,instrument,oilpainting,stamp,fur, cigarette,tea,coffee,pharmaceutical. |
| 35%-40% | Measuring apparatus,electrical appliances,measuring implement,precision mould,semiconductor,Battery,circuit board,electron parts,wafer,IC |
| 25%-35% | Reagent sample,filter disc,standard sample,seed,pollen,dry pollen and spice,dessert,dry food, |
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