What Does WVTR Stand For?

WVTR stands for Water Vapor Transmission Rate

WVTR, or Water Vapor Transmission Rate, is a measurement used to quantify the permeability of materials to water vapor. It indicates the rate at which water vapor passes through a material, typically expressed in grams per square meter per day (g/m²/day). WVTR is a critical parameter in various industries, including packaging, construction, and textiles, as it helps assess the moisture control performance of materials, ensuring product integrity and preventing damage caused by moisture accumulation.