ASTM F1249 vs. ASTM E96: WVTR Test Methods Comparison
ASTM E96 – Water Vapor Transmission of Materials Using Gravimetric Method (adopted in 1941) ASTM 1249 – Water Vapor Transmission Rate Through Plastic Film Sheeting Using a Modulated Infrared Sensor (adopted in 1990). ASTM E96 test method is also known as gravimetric or cup test. This method was developed in early 1940's, when good barrier ...