The light box is an indispensable tool for color evaluation, color quality control, and color contrast. Light box light source for the color evaluation to provide a good observation environment, help to improve product quality, access to domestic and foreign textile certification bodies and processing companies unanimously approved. The following is the operation of the light box light tips: Detection angle: In addition, the detection angle will directly affect the review results. According to international standards, only two detection angles can be used, they are: 45 ° ramp: 45 degrees light, zero detection (45 ° - 0 °) In this layout, a specific 45 degree fixed angle table (45 ° Fixed Angle Table) is used to illuminate the sample from 45 °, and the test is tested from zero (vertical). Zero light source, 45 degrees detection (0 ° - 45 °) That is, the light source is irradiated on the sample from the zero (vertical) incident angle, and the detector dete...