Labthink International recently conducted an inter-laboratory research study for water vapor transmission (WVTR) testing of flexible materials. The study adhered to ASTM F1249 (Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor). This study involved 48 labs and represented instruments from Mocon, Labthink, and GBPI. Below is a sampling of how the test data appears on the report.


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