... as plastic film and laminated film.Labthink has Water Vapor Permeation Instrument that comply with humidity detection method, electrolytic ... detection method and gravimetric test method respectively.Water Vapor Permeation Instrument conform to standards of ASTM E96, ASTM ... T523, TAPPI T557, GB 1037,GB/T 16928.Water Vapor Permeation Instrument has below features: 1. High automatic control ...