This standard specifies how to determine the water vapor transmission rate, water vapor permeability, water vapor permeability coefficient, and water vapor diffusion resistance index of rigid foam plastics. …
JIS K 7225:2005 Referenced Document
JIS K 7100 Plastics -- Standard atmospheres for conditioning and testing
JIS K 7248 Cellular plastics and rubbers -- Determination of linear dimensions
JIS K 7225:2005 history
2018JIS K 7225:2018 Rigid cellular plastics -- Determination of water vapour transmission properties
2005JIS K 7225:2005 Rigid cellular plastics -- Determination of water vapour transmission properties