Ink knowledge-understanding of ink parameters

1.Interfacial tension: Take mN/m as the unit. Unlike the so-called "surface tension", the interfacial tension includes the surrounding medium, for example, air is mostly used as the medium during testing. This parameter affects the following performance? a. How sharp is the edge of the printed font? b. Ink permeability in paper and other media? The range of common ink interfacial tension values ​​for ink fluidity in ink cartridges:? Epson and Canon black and color inks <34 mN/m @ 20C, HP and Lexmark black inks> 50 mN/m @ 20°C,? HP and Lexmark Color ink <34 mN/m @ 20°C. Use low interfacial tension ink: small ink droplets, the ink will penetrate deeper into paper or other media. Use high interfacial tension ink: large ink droplets, less permeability to the medium. However, too high interfacial tension will cause a lot of foam , This ink is not up to standard. 2 Viscosity: Viscosity will affect the following properties of the ink: a. The edge sharpness of printed fonts and ink permeability in paper and other media b. The fluidity of the ink in the ink cartridges (especially the ink cartridges with sponge, such as HP color ink cartridges and Lexmark black/color ink cartridges) c. The ink flow is blocked (if the ink viscosity is too high, the ink flow will be completely blocked). 3. pH value a. If the pH value is too low (acidic), the ink will corrode the ink cartridge b. If the pH value is too high (alkaline), additional salt will be produced, which will reduce the service life of the cartridge (corrosion) and increase the conductivity c. To ensure good stability of the ink, the pH value of the ink must be equivalent to the pH value required by the dye 4. Conductivity: In the ink, the conductivity value is used to reflect the level of salt content. This parameter is affected by the following factors: a. The salt in the water/ink (such as sodium chloride) will damage the ink cartridge or even make the ink cartridge useless. b. The ionic nature of the dye will not damage the ink cartridge like salt. Generally speaking, the salt content should not exceed 0.5%, and the conductivity should be less than 10000us/cm; to avoid the formation of crystals in the nozzle. To 5. Density and particle size: This parameter is affected by the composition of the ink. a. The density of dye-based inks is mostly between 1.00 and 1.03 b. The density of pigment ink is approximately 1.04. The particle size of the ink should be less than 0.2um.

Ink knowledge-basic components of printer ink

The ink of an inkjet printer is the most important part of the printer. Ink for inkjet printers is different from general writing inks, it requires high thermal stability and chemical stability. It requires moderate viscosity, has the characteristics of high concentration, low molecular weight, good fluidity, and clear image layers. From the perspective of the composition of inkjet printers, the main materials are solvents and colorants, and additives such as antioxidants and viscosity modifiers are also added. Solvent occupies the largest proportion in inkjet printer ink and is the main component, which directly affects the physical and chemical properties of the ink, printing quality, printer printing speed, stability and other properties. However, the types of ink for inkjet printers are classified according to the colorants in the ink. The performance of the colorant directly affects the color and tone of the printed image, and its own color, mixing performance, solubility, acidity and alkalinity, and particle size are particularly important. Color inkjet printing mainly adopts the subtractive color mixing method in the mixed color inkjet technology, and uses complementary colorants such as yellow, blue, and magenta. Since the black produced by the subtractive color mixing method does not look black enough, black is added in order to obtain pure black to improve the print quality. The quality of the image overprinted by each color ink is completely dependent on the colorant's own performance and the effect of overprinting with other colorants. Ink for inkjet printers is mainly divided into two categories: dyes and pigments according to colorants. Pigments generally exist in the solvent in the form of particles, while dyes are dissolved in the aqueous solvent in molecular form. The dye molecules dissolve in the ink and penetrate or absorb into the surface of the substrate such as paper with the solvent. Because the dye can form a stable and uniform phase in the molecular state and solvent, the image printed by dye ink has high resolution and good clarity, but it has poor light resistance and water resistance, and it is mostly used in indoor occasions. In pigment ink, particles are dispersed into the ink, and the pigment particles remain on the surface of the substrate such as paper, so the color intensity and gloss of the printed image are high. At the same time, when it is exposed to the external environment or sunlight, it is resistant to light and high temperature decomposition, and is suitable for outdoor use, but the fineness of the pigment particles is very high.

Ink knowledge-water transfer technology

Just use water transfer ink with water transfer film (paper) to transfer the effect to any material, including computers, mobile phones, packaging, glass, ceramics, metal, wood, plastic parts, marble, ceramic sanitary ware, ceramic tiles , Handicrafts, toys, furniture, instrument housings, household appliances, automobiles and other objects that need decoration, etc., without any equipment, you can make unique products. In response to market demand, water transfer printing technology came into being. With the help of ordinary inkjet printers, the printed images are colorful and rich in layers. Users only need to use water transfer consumables to print customer-designed patterns on a special water transfer film, and then transfer them on the surface of the gift as needed. Print processing. The whole process can be completed in a few minutes, which is convenient and quick. Because it is based on the principle of drop-on-demand inkjet, there is no requirement for the number of gifts that customers want to print. One piece can also be printed. The printing effect is comparable to photos, and it is waterproof and wear-resistant. Water transfer ink can also be applied to oil-based direct printing platform printers. To The company produces and develops water transfer inks, completely using salt-free color paste, the ink is stable, no precipitation, no crystallization, no plugging, no smudging during transfer, and the printed image is bright in color and rich in layers; The packaging is 1KG and 20KG respectively.