The test procedure described in the “TPJLR.52.552 Decolorization of organic and decorative coatings and upholstery materials by removal staining” standard, developed by Jaguar Land Rover , a British multinational automotive company , applies to all organic and decorative coatings and upholstery materials fitted to Jaguar and Land Rover products.
This test procedure determines the discolouration of organic and decorative coatings and trim materials when in contact with or adjacent to natural or synthetic rubber, felt or other materials which are likely to cause staining due to removal by liquids. This method is based on the standard “BS 903-A33 Physical testing of rubber - Test methods for staining by contact with organic materials” developed by the British Standards Institution (BSI). Dry heat discolouration is covered by TPJLR.52.551.
A valid risk assessment must be carried out before performing the testing described here.
The main equipment used in these tests is a drip apparatus and a Heraeus Suntester (accelerated lightfastness tester) or approved equivalent.
For the tests, a sample of uniform thickness, minimum dimensions 150 x 25 mm, is first cut. A real component can be used if it is long enough or has a cross-section that will allow drops to pass through its entire length.
The test panel has nominal dimensions of 250 x 100 mm. Painted panels shall comply with normal manufacturing procedures and materials and shall be aged under the following ambient conditions:
It is preferable to use pale colors such as white or cream for plastic, leather fabric or upholstery test panels, although certain tests may require other colors.
When starting the test, the apparatus is first prepared and the sample and test panel are positioned as shown in the standard. Approximately 1 litre/24 hours of distilled or demineralised water is applied to the sample. After 24 hours, the surface of the test panel is cleaned and examined with clean cotton wool soaked in a mild soap solution where appropriate. The test panel is placed under the Heraeus Suntester set, which will provide an actinic energy level of 10 to 2,5 J/m2/s and a temperature not exceeding 40 degrees Celsius on the test surface. The test panel is exposed for a period of eight hours. Once completed, the test panel is examined.
The test panel is examined immediately before and immediately after the ultraviolet (UV) exposure cycle. If the tested sample fails to comply with the material standard applicable to the material in question at either stage, it is deemed unsatisfactory.
This Jaguar Land Rover test standard is based on the “ASTM B117-19 Salt Spray (Mist) Apparatus Operation Standard Practice” developed by the American Society for Testing and Materials (ASTM). This practice includes the apparatus, procedures, and conditions required to create and maintain a salt spray (mist) test environment. Suitable apparatus that can be used is listed in the standard appendix. However, this practice does not specify the type of test specimen to be used or the exposure times or the interpretation of the results for a particular product. This practice provides a controlled corrosive environment used to generate relative corrosion resistance information for metal and coated metal specimens exposed to a specific test chamber. Performance prediction in natural environments has rarely been correlated with salt spray results when used as data alone.
Among the numerous tests, measurements, analyses and evaluations that our organization has carried out for businesses in various sectors, it also provides testing services defined in the standard “TPJLR.52.552 Discoloration of organic and decorative coatings and flooring materials by removal dyeing” with its trained and expert staff and advanced technological equipment.
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