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Product Description
Yellowing
resistance test chamber is used to simulate the ultraviolet radiation and heat
of sunlight. The sample is exposed to ultraviolet radiation and temperature in
the machine. After a period of time, the degree of yellowing resistance of the
sample is observed (it is generally believed that the material tested in the
box at 70℃ for 3 hours is equivalent to the yellowing effect of 2 months in the
natural environment) can be stained gray as a reference. And then determine the
level of yellowing.…