Doubts and experiences in using metal ink

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Doubts and experiences in using metal ink

why do we sometimes use good metal ink, but the printing effect is still not ideal and not shiny enough? This is not only the quality of the metal ink used, but also the reasonable mode of production and operation. Designers often choose metallic colors other than gold and silver. Most printers use metal ink and four-color or other spot color ink to adjust 1 The ink cannot be used for static measurement and calibration of the metal spot color, but the metal raw materials used to produce the metal ink are relatively soft and thin metal sheets. Many printing operators are used to mixing the ink with some metal tools with hard edges. However, the metal raw materials are very sensitive to the shear force, and excessive shear force will cause deformation of the metal pigment particles or the formation of many fine particles. In order to avoid the impact of the shear force on the metal pigment particles, When adjusting the metal spot color ink, you should use some smooth tools and avoid high-speed mixing, otherwise the adjusted but gratifying ink will lose its luster

in addition, the ink media (such as resin and solvent) used by general ink factories in making metal spot color inks will be handy if they are used more. This is different from the metal inks already made. In addition, as mentioned above, the equipment for mixing metal spot color inks is also different from that for making ordinary inks. Therefore, if you want to deal with a large number of packaging and printing, you can get better results by directly ordering metal spot color inks from the ink factory

experience of using metal ink since the material used to make metal ink directly contacts with food, the plastic bag must be printed with the words "food" and other words on a prominent position. The chemical properties of metal ink are also very unstable. It should be strictly sealed during use and storage to avoid absorbing too much water and being directly exposed to light for a long time. In lithography, the use of inappropriate fountain solution will also affect its shiny effect. In addition, the density of metal pigments is large, so compared with ordinary inks, the pigment particles of metal inks are very easy to precipitate. If they are not fully stirred before use, and the bottom of the ink barrel is not checked for sediment before printing on the machine, the hue and gloss of the printed matter are quite different. During the printing process, the metal ink will volatilize with the solvent, and the viscosity will gradually increase. In order to ensure the stable and good fluidity and transferability of the metal ink, it is necessary to regularly measure the viscosity of the ink and add solvents appropriately to keep the viscosity of the ink in a stable state. The price of metal ink is much higher than that of ordinary ink. However, if the metal ink used in the ink residue is recycled, it will be found that the gloss has decreased significantly. Therefore, on the premise of smooth production, a small amount of metal ink should be added as many times as possible in the printing process, so as to achieve the principle of no waste

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