Coating knowledge: optical properties of metal ink

The key points are as follows: (1) due to the difference between the optical properties of metal pigment and common pigment, the optical properties of the produced metal ink are also very different from those of common ink The color of common ink will not change with the change of viewing angle, while for metal ink, the change of viewing angle will change the hue and brightness of metal ink (2) Factors affecting the optical properties of metallic ink the effect of metallic ink flash is the result of the combination of specular reflection and diffuse reflection of metallic pigment In order to achieve better metal effect, we should improve the specular reflection of metal pigment and reduce diffuse reflection Influence ink Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Coating home news: (1) the difference between the optical characteristics of the metal ink and the common ink because the optical characteristics of the metal pigment and the common pigment are different, so the optical characteristics of the metal ink produced are also very different from the common ink The color of common ink will not change with the change of viewing angle, while for metal ink, the change of viewing angle will change the hue and brightness of metal ink (2) Factors affecting the optical properties of metallic ink the effect of metallic ink flash is the result of the combination of specular reflection and diffuse reflection of metallic pigment In order to achieve better metal effect, we should improve the specular reflection of metal pigment and reduce diffuse reflection The main factors that affect the optical properties of ink are as follows ① The larger the size of metal pigment particles, the better the specular reflection effect of single pigment particles, and the higher the metal glossiness of metal ink, but its hiding power and dot reproducibility will be poor The smaller the particle size of metallic pigment, the better the covering power and dot reproducibility of metallic ink However, due to the existence of too much edge diffuse reflection, the metallic luster of metallic ink will decrease Users can choose the suitable size according to their own requirements, but the selection should be combined with the specific printing method Different printing methods need to use different metal ink with different metal pigment particle size, otherwise, the ink cannot be transferred smoothly in the printing process due to the large particle size, or the printing effect is not good due to the small particle size ② The particle size distribution of metallic pigment is also a factor affecting the optical properties of metallic ink Generally speaking, the particle size of metal ink refers to the average particle size D50 of metal pigment in ink, for example, 10 μ m metal ink, which means that 50% of the pigment particle size is less than 10 μ m when it is tested In fact, this index can not very accurately explain the performance of metal ink Many users will find that when you use metal inks from different manufacturers, although the particle size shown on their technical data is the same, the covering power and glossiness of metal inks after printing sometimes differ greatly, because the particle size distribution of gold pigments in metal inks from different manufacturers is wide and narrow With the same average particle size, the narrower the particle size distribution, the more orderly the overall arrangement of the pigment, and the better the glossiness and covering power of the produced metal ink Therefore, it is very important to analyze the particle size distribution for the characterization and quality control of the metal pigment, as well as the important embodiment of the technical level of different metal pigment manufacturers ③ The shape of metal pigment particles in traditional metal ink is irregular, which is called cornflakes (see Figure 1) Because the shape of each metal pigment particle is irregular and the edge is not smooth, the mirror reflection effect of particles is poor, and the edge diffuse reflection is serious, so the metal luster and covering power of metal ink are also poor Aika uses the latest condensation and grinding technology to produce a new silver dollars (silver type, see Figure 2) metal pigment Each particle of the metal pigment has a round structure, uniform size, good specular reflection effect, and the ink produced by it has excellent metal effect and covering power As a result, this new metal pigment has been widely used as soon as it is introduced Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,