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1.1。7 substances as bright, including chalk, or chalk for wall paint, polishing, metal (Optical Brightening (whitening) Agents) สารดังกล่าว will absorb light. UV visible and light is absorbed. Is the section that was released at the wavelength than the original.Brightening Agents often used at low concentrations. And also provide on the properties of light in different resin (rubber) are the same, but generally, speed, its light is quite low.
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