PRESERVATION OF MATERIALS IN CONTROLLED HUMIDITY STORAGE

摘要

Few materials will remain useable indefinitely, even in storage, unless they are protected in some manner from natural destructive forces. Although these forces include such chemical, physical, and biological agents as acids salts, sunlight, heat and cold, oxygen, ozone, fungi, etc., under general storage conditions water is by far the most damaging. It is the one factor common to most deterioration, acting in combination with or in support of other forces to produce deterioration.nTherefore, the primary goal of good storage is to protect stored materials from water, either in the form of condensed moisture or water vapor. There are several different methods now in use to achieve this pur¬pose, among which are protective coatings, packaging, chemical impregnation and dehumidification.