This standard specifies the conditioning and testing methods for all plastics and all types of specimens thereof under constant atmospheric conditions corresponding to the average atmospheric conditions in the test room. However, it does not apply to special tests or materials, or to special atmospheres that reproduce special weather environments.
JIS K 7100:1999 history
1999JIS K 7100:1999 Plastics -- Standard atmospheres for conditioning and testing
1981JIS K 7100:1981 Standard atmospheres for conditioning and testing of plastics