LIGHT-RESISTANCE TESTING METHOD AND LIGHT-RESISTANCE TESTER

摘要

PURPOSE: To obtain the light-resistance testing method and the light-resistance tester, wherein the surface temperature of a sample is made uniform, and the evaluation of the sample whose surface property is changed by the effect of especially wind can be tested with excellent reproducibility. ;CONSTITUTION: A light source 16 is arranged in a testing cell 17. A sample holder 10 for attaching a sample 11 is attached to a position, which agrees with the light applying curve of the light source 16. A rotary frame 12 rotates around the holder 10. In this sample rotating system comprising these parts, the distance between the light source 16 and the sample 11 is made to be in the range of 200mm-325mm. An air introducing system, which makes the air flow at the average wind speed (V) of 0.3m/sec-0.8m/sec, is provided on the surface of the sample 11 that is attached to the sample rotating system, is provided. At this time, the moving speed of the sample 11 with respect to the average wind speed (V) is made to be in the range of 0.35Vm/sec-0.5Vm/sec. A reversing system 4, which reverses the rotating direction of the sample 11 corresponding to the moving speed with respect to the average wind speed (V) at every specified number of rotation, is provided.;COPYRIGHT: (C)1994,JPO