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Home / Blog / ASTM E96 – Water Vapor Transmission Rate of Materials Using Gravimetric Method
ASTM E96 – Water Vapor Transmission Rate of Materials Using Gravimetric Method August 19,2019.

As we all know, nowadays products packaging plays an important role in protecting product quality for the duration of its require shelf life.  For moisture sensitive products, such as dry milk powers, medicines, etc., moisture barriers materials are needed to control moisture into and out of packaging.  It is essential to accurately test the barrier property, also called as water vapor transmission rate (WVTR).There are many testing method for the water vapor transmission rate, testing standard ASTM E96 is known as gravimetric or cup test method, usually only measures WVTR above 0.5 g/(m2*day) the best.


WVTR Analyzer



GBPI provides Water Vapor permeability WVTR Tester Machine for Packaging Materials Water vapor transmission rate testing, comply to ASTM E96 Cup method. GBPI W360 water vapor permeability analyzer comply to ASTM E96, also conforms to ISO 2528, GB 1037, GB/T 16928, ASTM D1653, TAPPI T464, DIN 53122-1 international standards.



Test range        0.01~10000 g/(m2•24h)

Test precision    0.001 g/(m2•24h)

Temperature range    10~50℃

Temperature precision   ±0.1℃

Humidity range Dry method: 0~20%RH; Optional—double gas flow humidity method: 30~90%RH

Test area   28.27 cm2

Sample size  Φ72 mm

Sample number   1~6 pcs (each sample is independent)

Sample thickness   ≤2mm

Instrument size  650mm× 580mm× 490mm



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