Constant temperature and humidity laboratory is a laboratory will by some special equipment and technical methods and makes the indoor temperature and humidity when compliance with a wet and to experiment with standard atmospheric requirements. Constant temperature and humidity laboratory is the production enterprise of product quality inspection and control, and the circulation of commodities in the field quality inspection facilities. Constant temperature and humidity laboratory widely used in cotton, wool, chemical fiber, paper, packaging, tobacco production enterprise and quality inspection, detect, and other departments, according to ISO and GB relevant specification, textiles, textile materials, paper, paper and carton of commodities such as quality of the project in physical inspection necessary standard atmospheric conditions. Textiles and textile raw material inspection standard according to the atmosphere ISO139 and GB6529 standard, the temperature is 20 ± 2 ℃, relative humidity 65%-2%; Paper.