As a non -optical component in the water -based UVLED curing ink, the competition of pigments and causes to absorb UVLED light, which greatly affects the solidification characteristics of the system in the UVLED curing system. Since the pigment can absorb a part of the radiation energy, this will affect the absorption of light caused by the light cause, and then affect the concentration of the free radicals that can be generated. As a result, it will reduce the curing speed. Each color has different absorption rates (light transmission) of different wavelengths. The smaller the absorption rate of the pigment, the greater the light transmission rate, and the faster the coating. Carshrilia's ultraviolet absorption capacity is high, the slowest solidification, strong white pigment reflector, which also hinders solidification. Generally speaking, the order of absorption of ultraviolet light is: black> purple> blue> blue> green> yellow> red. Different colors are different, and the concentration of pigments of the same color is different. The effect on the fascination of ink membrane is different. As the amount of pigment increases, the curing rate of the ink film has decreased to varying degrees. Among them, the amount of yellow paint has the greatest effect on the curing rate of the ink film, followed by red pigments and green pigments. Because the black absorption rate on ultraviolet light is the highest, the light transmission rate of black ink is the lowest, so the change of the amount of dosage has no significant effect on the curing rate of the ink film. When the amount of pigments is too large, although the curing rate of the surface layer of the ink membrane is fast, the surface of the surface of the surface absorbs a large amount of ultraviolet light, reduces the light transmission of ultraviolet light, affects the curing of deep ink membranes. Do not solidify, it is easy to produce "wrinkle skin" phenomenon. In summary, the color of the pigments is different from the concentration of the pigment that affects the water -based UVLED ink light. After understanding the reason, we should be targeted when selecting the UVLED optical curing system. Different from irradiation time, etc. The effect of the pigment curing is also different.
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