You can choose to use a light reflection angle measurement. Like a "mirror" of the surface of the reflex 100% of the light, or the reflection-only part of the light, depending on the quality of the surface of the coating. Consider gloss level, select the measurement point of view, be sure to change data, shiny provides reliable data. The point of measurement is important because the pigment to infiltrate into the depths, there will be decentralized. The human eye in the background, the ink on the response from the more strongly the gloss.

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