The so-called ink concentration is ink coloring power, it is a common name for reflecting ink dispersion and pigment content in ink. In other words, the higher the dispersion of pigment, the higher the concentration of ink; the higher the pigment content in the ink, the greater its concentration. In addition to pigment to determine the concentration of ink, binders, fillers and additives, to a certain extent, also affect the concentration of ink. The production process shows that the ink concentration is one of the important indicators affecting the printing quality. Therefore, it is of great significance to correctly understand and understand some factors related to the ink concentration for the production process control of the printing process and improve the printing quality of the products. Ink is a hydrophobic colloid, which is a uniform mixture of pigments, binders, fillers and additives. Pigment is a coloring substance, which plays a role in developing ink. It is a kind of colored material which is insoluble in water and binder, but can be evenly dispersed in binder. It is a solid powder. The pigment content in the ink determines the durability and concentration of the ink, and also affects the drying performance of the ink. As the main material of color development, pigment plays a decisive role in the quality and suitability of ink. Therefore, for printing, only when the pigment has fine particles, large oil absorption, small specific gravity, small covering power, strong coloring power, good stability, less color deviation, bright color, and good heat resistance, light resistance, acid and alkali resistance and other good properties, can the ink color of the printed matter obtain better quality results. According to the properties and chemical composition of pigments, pigments can be divided into inorganic pigments and organic pigments. Inorganic pigments include various metal oxides, chromates, carbonates, sulfates and sulfides, such as aluminum powder, copper powder, carbon black, zinc white and titanium dioxide. Inorganic pigment has good light resistance, heat resistance, large ratio and strong covering power, but it can not meet the requirements of multi-color and high-speed printing.The commonly used organic pigments include chromogenic pigments and lake pigments. The main chromogenic pigments are phthalocyanine pigment, nitroso pigment, azo pigment and reducing pigment. Lake pigments include: basic dye lake, azo lake pigment and acid dye lake. Most organic pigments are the main raw materials of color ink because of their good coloring power, small particle size, light weight, soft texture, bright color and high concentration. Binder is also the main component of ink. It is the raw material to make ink into fluid. It has a certain viscosity. It can mix and connect the solid particles such as powder pigment, and transfer and adhere the adhesive pigment to the printed matter. At the same time, the printing product has a certain gloss. Its color, tension, viscosity, water resistance, dryness and so on are the important factors that affect the ink performance, and its dosage is also an important condition to change the fluidity and concentration of ink. The filler is a fine, white powder solid material, so it can be evenly and well dispersed in the binder. Such as potassium sulfate, magnesium carbonate, calcium carbonate and aluminum hydroxide are fillers. They play a role in adjusting ink properties, consistency and concentration. After the ink is processed into finished ink with pigment, binder and filler in a certain proportion, due to different printing conditions, the consistency, consistency and dryness of the original ink may not be able to adapt to various conditions. Generally, some additives should be used to adjust the ink, such as anti adhesion agent, tackifier, drying oil, glossing paste and glossing oil, etc After, will also change the concentration of ink. Ink concentration, its consistency is also large, so, the size of ink concentration, determines the depth of ink hue. When the ink concentration is high, the printing hue is darker; on the contrary, the printing hue is shallow. The ink with high concentration consumes less ink in printing, and the ink quality is also better; on the contrary, the ink with small concentration uses more ink in printing, and the ink color is relatively light. The concentration of ink in printing large area plate products, the performance of printing effect is particularly prominent. It can be seen that the ink concentration directly affects the printing quality of the product. Therefore, when printing fine screen or fine line products, the ink with high concentration should be selected for printing, while the products for printing the field layout should be printed with a slightly lower concentration of ink. Because of the thixotropy of the ink, when the printing environment temperature is high, the machine speed is fast, and the ink becomes thin when heated, the concentration of the ink will decrease. This requires printing with a slightly higher concentration of ink, which can better ensure the ink quality of the product. On the contrary, you can choose a slightly lower concentration of ink to print.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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