Constant temperature and humidity laboratory widely used cotton, wool, chemical fiber, paper, packaging, chemicals, tobacco manufacturers and quality inspection, commodity inspection, Xian Jian, museums and other departments, constant temperature and humidity laboratory is the manufacturer of the product quality inspection and control and distribution infrastructure in the field of inspection to ensure the quality of goods. By a laboratory constant temperature and humidity laboratory is about some special equipment, technical methods and construction technology to comply with certain indoor temperature and humidity conditioning and testing requirements of the standard atmosphere. In accordance with the relevant ISO and GB standards, testing textiles, textile raw materials, paper, paper products and cardboard boxes and other merchandise quality physical projects must be carried out under standard atmospheric conditions. Textiles and textile raw materials inspection standard atmosphere press ISO139-1973 "Textiles - the humidity and temperature and humidity testing standards" and GB 6529-198 "textiles conditioning and testing standard atmospheric" standard temperature of 20 ℃ ± 1 ℃ relative humidity 65% ??± 2%; standard atmosphere paper, paper and cardboard commodity inspection in accordance ISO187- 1990 "Pulp, paper and cardboard - atmospheric temperature and humidity test and control procedures and process standards process and experimental temperature and humidity Steps "and GB10739-1989" standard atmosphere "Pulp, paper and cardboard sample processing and testing standards, the temperature of 23 ℃ ± 1 ℃, relative humidity of 50% ± 2%.