GMW3235 |
Note: Nothing in this standard supercedes
applicable laws and regulations.
Note: In the event of conflict between the
English and domestic language, the English language shall take
precedence.
Purpose. This test procedure describes a
testing method how to determine the fogging tendencies of all
interior and air ventilation system materials.
Two alternative tests are specified with different methods of
evaluating the degree of fogging.
Method A - Photometric Method. This method
evaluates the volatility of organic constituents by reflectivity
measurements (Coding A).
Method B - Gravimetric Method. This method
determines the mass of fogging condensate on aluminum foil in mg by
means weighing of foil before and after the fogging test (Coding
B). Because of the different dimensions of the available fog test
units a factor has been established to compare the results of the
different instruments. The factor can be obtained in Appendix
A.
Foreword. The test defined in this standard is
designed to evaluate the "fogging" tendencies of all interior and
air ventilation system materials. The resulting ratings "fogging
emission" influenced by the volatile organic constituents,
liberated under conditions of high ambient temperatures and
subsequently deposited on cooler surfaces, is determined.
Test results obtained by these test methods are not directly
comparable and only that test method specified by the appropriate
coding in the material specification, engineering drawing etc.,
shall be used.
Applicability. This Test Procedure is
applicable to all interior and air ventilation materials used in
the vehicle interior. The results will provide complementary
information to GMW15634 and GMW8081.
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