ISO 139:1973

Textiles — Standard atmospheres for conditioning and testing

The conditions of temperature and relative humidity for pre-conditioning, conditioning, and testing of textile materials of all kinds and in all forms are specified. A standard temperate atmosphere, a standard temperate atmosphere for testing, a standard tropical atmosphere, and a standard tropical atmosphere for testing are defined. (The adjectives “temperate” and “tropical” have a limited use only for the textile industry.)