(1) Letterpress ink Relief inks include: printed books and periodicals inks, letterpress rotary books and periodicals inks, printed color inks, printed plastic inks, rubber letterpress plastic inks (that is, flexographic plastic inks), letterpress water-based inks, letterpress wheel transfer newspaper inks, etc. Printed book inks are mainly used to print books and periodicals, but also plate inks. When printing books and periodicals on a platform machine, the ink is a penetrating dry ink with a certain degree of blackness, the viscosity is lower, and the yield value is lower, to adapt to the ink roller Printing machine. The paper structure of books and periodicals is rough, but they have good oil absorption performance, so they use permeable dry ink. Printed color inks are often used for copperplate color printing, some are called copperplate inks. The printing is carried out by a small flat press, so the pressure is relatively large and flat, and it is mainly based on printing dots, so the transfer performance of the ink is required to be good, the ink film layer in the dots should be uniform, and the fixation of the ink should be Fast, the ink film layer is not spread after imprinting, so that the dots on the printed matter have good contrast contrast, and the imprint is consistent and full. This type of ink should have a relatively low yield value, have a certain fluidity and viscoelasticity. Once the ink is stamped on the paper, it should be able to fix and dry immediately. Therefore, the connection material of the ink is mainly based on the permeation and drying of the oxidized conjunctiva and the solvent, which not only dries quickly, but also has good ink transferability. Relief printing ink is also called news web printing ink. It needs to adapt to high-speed printing, so news web printing ink should have good flow performance and low viscosity. Generally speaking, the faster the printing speed, the better the fluidity and viscosity of the ink. Also lower. News rotary ink is a typical penetration drying ink, which is almost completely dependent on the absorption and drying material of paper fiber to dry. Topographic Rotating Book Ink is suitable for books and periodicals with printing speed between platform machine and news rotating machine. (2) Lithographic ink Lithographic inks include various offset printing inks, lithographic iron printing inks, lithographic photosensitive iron printing inks, colographic printing inks, offset printing thermosetting inks, etc. One of the characteristics of offset printing ink is that the color of the ink is higher in coloring. Because offset printing is indirect printing, the ink printed on the printed matter is very thin, and only a strong coloring power can meet the requirements. As the printing speed becomes faster and faster, The ink should have good flow properties and good drying properties. According to the characteristics of offset printing, the ink should have good water resistance, so the water resistance of the pigment in the ink is very high. Most lake pigments are soluble in water and will cause scumming. If the connecting material is hydrophilic emulsified, it will cause poor ink transfer and dryness. The resin type connecting material is more resistant to water than the oil type connecting material. (3) Gravure ink Gravure inks include various photogravure inks, engraved gravure inks, and gravure plastic film inks. Photographic gravure ink is a typical volatile dry ink, the viscosity is the lowest of various inks, it has good fluidity and low surface tension, which is convenient for filling into the concave holes of the printing plate, the ink adhesion is strong, and the paper pressure After printing, the ink can be transferred from the concave hole to the surface of the printed product to the maximum extent. The ink dries extremely fast on the printed product and must be thoroughly. The characteristics of engraved gravure ink are thick and non-sticky, both loose and short, with appropriate thixotropy, the ink should be able to easily fill the ink hole of the gravure, and it is easy to wipe off the blank part of the ink on the plane when printing Part of the ink should also be easily transferred to the printed matter. After the ink is printed on the printed matter, the dots and lines of the graphic should not be spread out and become larger, but should be dried quickly. The pigment expressive power of engraving gravure ink is mainly ink color, and transparent pigment cannot be used. Engraved gravure is more commonly used in the printing of marketable securities, so it has higher requirements for various properties of pigments, such as light resistance, water resistance, heat resistance, oil resistance, etc. In order to prevent counterfeiting, some special additives are often added to the ink. (4) stencil ink The stencil ink includes screen printing ink, screen plastic ink, oil-type transcription ink, water-type transcription ink, etc. Because the silk screen print is thickened with a rubber squeegee and pressed, the flow characteristics of the silk screen ink should be thick, loose, and non-sticky, and the pigment content in the ink can be correspondingly less, so that the ink can be smooth Through the wire mesh. The oxidative drying ink in the screen printing ink, after printing on the printed matter, the faster the drying, the better, and the volatile drying ink uses heating process to facilitate the solvent volatilization. Transcription inks are generally not very fluid and have relatively low viscosity, and mainly rely on penetration drying. (5) Special function ink Microcapsule inks, substances with special functions are sealed in capsules, made with appropriate connecting materials, and printed in a way that does not damage the capsules, so that the printed matter has special properties. For example, the liquid crystal ink uses the difference in temperature and pressure to change the color of the liquid crystal, which is used to represent the numbers of thermometers and calculators. The perfume ink is made of spices, and the capsules are broken to give out fragrance; the foaming ink uses a foaming agent. After printing, it is heated and foamed for printing Braille and other printed materials. Gold and silver ink, use metal powder instead of pigment. Previously, gold powder and silver powder were attached to the gold and silver inks. For gold and silver printing, mix the ink and gold powder or silver powder just before printing. There are also mixed inks. Brass powder for gold powder and aluminum powder for silver powder are made of flakes, giving metallic luster. Fluorescent inks are inks that use fluorescent pigments, which bring bright and strong color effects, so they are often used in eye-catching prints such as posters, packaging materials, advertisements, and exhibits. Fluorescent pigments dissolve fluorescent dyes in synthetic In the resin, the particles are coarse, and the light resistance is also weak. Once irradiated by the ultraviolet lamp, a more brilliant effect can be obtained. Magnetic ink is an ink made of magnetic iron oxide powder. It is used to read the magnetic ink characters, control the magnetic properties of the magnetic powder, read from the magnetic beam emitted from the printed special literature and fonts, and is mainly used to print credit cards. Tape strip on the tablet. Security ink (anti-counterfeit ink) is an ink for printing various securities. It must have various excellent light resistance, heat resistance, water resistance and oil resistance properties. Gravure ink is one type. In order to prevent forgery and tampering, it must be compounded with a compound that can see a special reaction, and it is also used as a safety ink for ink disappearance, discoloration, discoloration, discoloration, or color. Conductive ink is an ink made of gold, silver, copper or conductive carbon black. The dried ink layer has conductivity and is used for printing of printed circuits and electrodes. Gold powder, silver powder, and copper powder produce their own conductive properties, but the price of gold and silver is too high, copper is easy to oxidize, carbon black is prone to differences due to different raw material properties, and graphite type crystals have the best conductivity and are currently more commonly used. One kind. Reprint ink, subpoena reprint ink, use hot-melt type heating and melting to print. Carbonless copying is made by colorless coloration due to pressure. Unnecessary copying parts use desensitizing ink to reduce contact during copying and lose the copying effect. Chemical functional materials that prevent color formation are used. There are many other functional inks, there are monitoring inks that change color under the action of gas, temperature indication inks that change color due to temperature changes, color-developing inks that change from colorless to colored under the action of light, and Edible ink printed on food, pyrotechnic ink printed on the friction part of matchbox, etc. Door Buffers,Soft Close Buffer,Kitchen Door Buffers,Cabinet Door Buffers Wenzhou Zhaoxia Hardware Co.,Ltd , https://www.zxcabinethardware.com
In order to adapt to the printing of high-quality paper at high speeds, the permeation drying type or the oxidized conjunctiva drying type can no longer meet the requirements, and it is easy to produce poor dryness, poor adhesion, powdering, smudging, etc. To overcome these shortcomings, thermosetting inks are used. That is, during printing, after baking at a high temperature of 200 to 250 ° C, the solution in the ink escapes, so that the ink is fixed on the printed matter.