Ink, colorant for printing. It is composed of pigments, binders and additives. It is used for printing on books, periodicals, packaging and decoration, architectural decoration, etc. Ink is the embodiment of information, the most direct carrier of graphic information.
Ink is one of the important consumables in the printing process and one of the main components of printing costs for printing companies. The quality of ink performance directly determines the printing efficiency of printing companies. At present, China's main printing inks can be divided into four categories: solvent-based inks (traditional inks), UV inks, water-based inks, water-based UV inks, of which the last three are environmentally friendly inks. Most people don't know much about inks. Although they often hear water-based inks and UV inks in their ears, why these inks are environmentally friendly inks and their superiority is not known. Now the author interprets the knowledge of ink in printing through the comparison of Yoshik ink and Zhongyi ink.
Basic parameters
YB Ink Golden Bauhinia F3 Series Sheet-fed Offset Quick-Finish Bright Ink
Ys Ink Gold Bauhinia F3 Series Sheet-fed Offset Quick-set Gloss Ink Parameters
Zhongyi UVB-advertising four-color ink series
Zhongyi UVB-advertising four-color series ink parameters
The main components of ink include: pigments, binders, additives. The pigment determines the hue and intensity of the ink, and reflects the reproducibility of the ink. The binder is one of the main components of the ink and acts as a medium for dispersing the color and auxiliary materials. It is prepared by dissolving a small amount of natural resin, synthetic resin, cellulose, rubber derivatives, etc. in dry oil or solvent. It has a certain fluidity, so that the ink forms a uniform thin layer after printing, and a certain strength film layer is formed after drying, which protects the pigment and makes it difficult to fall off. The nature of the binder directly determines the fluidity, viscosity, and drying properties of the ink, so the basic parameters of the ink are determined by the binder. The additives are mainly used to adjust the drying and viscosity of the ink, and to assist.
Environmentally friendly inks such as solvent-based inks and water-based inks, the main difference lies in the connection material. The connecting material of traditional ink is mainly composed of stupid, grease and other organic solvents. Generally, this organic solvent is toxic and will cause harm to people and the environment. The solvent of water-based ink is mainly composed of non-toxic solvents such as ethanol and water. It is harmless to the human body and the environment. And the water-based ink has good fluidity, strong color reproducibility, good adhesion, strong water resistance, and fast drying. It is the world's recognized environmentally friendly printing material. It is also the only ink currently approved by the American Food and Drug Association among all printing inks.
Viscosity: When a liquid flows, it deforms, and the frictional resistance caused by the relative movement between two layers of ink. Viscosity is an important performance of ink, which determines the stability of ink transfer in the printing press. Most printing inks are now pseudoplastic fluids. The characteristic of such fluids is that when the fluid itself deforms, it will produce a shear rate. When the shear rate increases, the year will decrease. When it reaches a certain value, the viscosity of the fluid will be Keep the same, the viscosity at this time becomes the yield value of the fluid. To ensure the ink in the printing machine, the stable transmission viscosity must reach a certain level, to ensure that the ink will not leak in the ink fountain, when the ink roller reaches a certain speed, the ink will flow out steadily.
Dryness: It is the ability of the ink to transfer from the ink roller to the substrate to the ink completely attached to the substrate, it depends on the connection material. The printing drying methods can be roughly divided into: volatile drying, oxidized conjunctival drying, penetration drying, and UV light drying. Volatile drying is a method of drying using the volatility of the connecting material itself. Most volatile connecting materials are toxic; oxidative conjunctival drying is a method of drying by chemical reaction of the connecting material itself; penetration drying is through the connecting material and the printing The "anchor effect" of the objects and the secondary binding force are used for drying; the UV drying room is irradiated with UV light to dry the ink. The quality of the drying performance directly determines the quality of the printing quality. If the drying is too fast, the ink will dry before it spreads, which will result in insufficient spreading of the printed product dots and the printing quality will be reduced. Therefore, the drying property of the ink must be controlled within a certain range, and the drying performance of the ink must be paid attention to when purchasing.
Original link: http://oa.chinabyte.com/494/11034494.shtml
Protection face mask,Face masks,Medical face Mask,Medical face masks disposable,KN95 Face Mask
DongGuan Jinao Packaging Products Co., Ltd , https://www.jinaojewelrybox.com