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Test Method: SATRA TM343

Contact storage test for discolouration

February 2023


This method is intended to determine the propensity of a material to cause discolouration of another material when stored in close contact. This method is applicable to all materials which are used in intimate contact, and to adhesives which are used to bond them.


Either two dissimilar materials placed in intimate contact or a single piece of material coated with a product such as an adhesive, are placed between glass plates. The assembly is stored in the dark for a prescribed period at an elevated temperature. The test specimens are then examined for any discolouration compared to unexposed reference samples. Discolouration indicates that the materials are likely to discolour under normal service conditions.


This Test Method does not reference any additional Standards or Test Methods.


First issued November 1992. Revised February 2023.


This test method is available to members and non-members.


This price is for a printed copy of the Test Method.

  • Members: £75
  • Non-members: £215



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