Water vapor transmission rate (WVTR) of plastic films with the gravimetric dish method

The gravimetric dish method can be used to determine the water vapor transmission rate (WVTR) of materials that have a high water vapor permeability.

This method is intended for plastic films or sheeting materials with a water transmission rate of over 1 g/m2/day. The maximum sample thickness is 3 mm.

In the test, a water-absorbent material is placed in a metal cup that is covered by the studied material, which is sealed to the cup with wax. The test sample is placed in a conditioned cabinet and its mass is measured. From this, the WVTR value can be calculated.

The method is not applicable for materials that are damaged by hot wax or shrink under the used test conditions.

Suitable sample matrices
Single- and multilayer polymeric films up to 3 mm thick.
Required sample quantity
Four A4 sheets
Typical turnaround time
3 weeks after receiving the samples
Available quality systems
Accredited testing laboratory
Method expert
Ryan Johnsson
Ryan Johnsson

Pricing and online order

First sample (Excl. VAT):
224 €
Additional samples (Excl. VAT):
136 €per sample
Large batches of samples are eligible for discounts.

Samples are entered during checkout.

Our experts review all orders to ensure the testing method is suitable for your needs and samples.

Questions? We're happy to help.

Questions? We're happy to help.

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