Simulating ultraviolet radiation from sunlight anti-yellowing test machine

Yellowing resistance tester is to simulate the ultraviolet radiation and heat of the sunlight. The sample is irradiated with ultraviolet light and temperature in the machine. After a period of time, the degree of yellowing resistance of the sample is observed (it is generally considered that the material is in the box at 70 ° C) The test for 3 hours is equivalent to the 2-month yellowing effect in the natural environment.) The stained gray mark can be used as a reference to determine the level of yellowing.

Standard:

GB/T18830

ASTM D1148

ISO8580