| Currently used in printing ink, mainly by using the ink | | | | of pigment changes. Alone in the ink solvent and the |
| of the printed version of the structure of categories, | | | | presence of the same kind of distinction in Figure |
| mainly letterpress printing ink, offset printing inks, | | | | 3-39 volatile solvent as shown. |
| gravure inks, special printing inks. | | | | Separate volatile solvent evaporation time and the |
| Screen printing ink is a printing ink, its variety, | | | | amount is proportional to, but the ink over time |
| classification is also varied. However, there are | | | | reduced the increase of volatile, take a long time to |
| several major classifications. | | | | complete evaporation, it can be measured out, so |
| According to characteristics of ink Category: can be | | | | the ink film in the solvent president time residual. In |
| divided into Fluorescent ink , Light ink, fast fixing ink, | | | | screen printing, because of slow use of high boiling |
| magnetic ink, conductive ink, scented ink, UV-drying | | | | point solvent evaporation, residual solvent issues |
| ink, sublimation ink, Transfer Ink And so on. | | | | require special attention. Ink film in the role of residual |
| Was based ink by the state classification; gel ink, | | | | solvent from the plasticizer to soften the ink film, and |
| water color ink, oil ink, resin, ink, starch paste and so | | | | brought many other adverse effects. |
| on. Solid ink, screen printing, such as electrostatic | | | | Solvent evaporation drying type ink, easy to use, |
| toner. | | | | with fast-drying, therefore widely used. The |
| Printing materials under Category: Paper ink: oil-based | | | | disadvantage is that excessive use will reduce the |
| ink, water-based ink, high gloss inks, semi-gloss inks, | | | | solvent resistance, heat resistance.response drying |
| volatile drying inks, natural drying inks, paints matrix | | | | inks. This ink ink film during the formation of low |
| printing ink, plastic synthetic paper-based printing ink, | | | | molecular weight, which was pre-polymer state, and |
| paperboard carton inks. | | | | then oxidized in air, by heat, light or reactive |
| Fabric ink: Water-based ink, oil ink, emulsion-based | | | | substances of chemical reaction while the polymer to |
| inks. | | | | form the ink film. At this time arise between the resin |
| Wood ink: water-based ink, oil-based ink. | | | | crosslinking, the formation of a new resin crosslinking |
| Metal ink: aluminum, iron, copper, stainless steel and | | | | structure, as shown in Figure 3-40. After cross-linking |
| other special inks of different metals. Leather Ink: | | | | nature to become stable, has better physical |
| Dedicated ink printed leather. | | | | properties. |
| Glass ceramic ink: glassware, glass crafts, ceramic | | | | The chemical reaction rate, the higher the |
| containers with ink. | | | | concentration the reaction material the faster the |
| Plastic with ink: PVC with printing ink, ink styrene, | | | | catalyst can be added another, as well as heat, light, |
| polyethylene, ink, acrylic ink and so on. | | | | the role of the quicker response time. Using reactive |
| PCB ink: conductivity of ink, ink corrosion resistant | | | | ink, the heating effect for the accelerated hardening |
| plating and anti-fluoride and alkali resistance ink. | | | | of the best. There is not the type of heating can not |
| Book by Screen printing inks Mainly dry type, | | | | be hardened. However, some deformation of |
| classification introduced screen printing ink as follows. | | | | substrate heating and ink resins, paints the strength |
| 1. According to the classification in the form of | | | | of wood heat resistance with the heating time to |
| screen printing ink speaking introduction.evaporation | | | | pay attention to the temperature adjustment. |
| drying type ink. The main constituents of ink film | | | | Evaporation drying type ink, printing ink and dried ink |
| polymer material, after printing Solvent Volatile, its | | | | film is reversible between, but no reversible reactive |
| molecular substances on the formation of the ink film. | | | | ink. |
| Ink film formation process: the separation from the | | | | Solvent evaporation temperature drying inks with |
| solvent molecules are several aggregation to form | | | | volatile as a result of reaction in different forms. Ink |
| nuclei; its nuclear build-up into molecules (growth); | | | | changes are also different. |
| continue to grow and form dried pellets; dried pellets | | | | A. Oxidation polymerization-type ink. Oxidation |
| formation membrane aggregation. | | | | polymerization-type ink is oil modified alkyd resin as |
| Such volatile changes in drying is reversible, that is, | | | | the main component of the ink. This ink is the main |
| using solvents dried ink film may re-dissolve, as | | | | reaction occurred in some oil oxidation, resulting in |
| shown in Figure 3-37. | | | | polymerization, a polymer. The reaction at room |
| Ink transferred to the substrates, the solvent ink ink | | | | temperature can be gradually carried out under |
| film with the first occurrence of the volatile solvent, | | | | conditions, such as heating will speed up. The amount |
| the evaporation process as shown in 3-38. Ink | | | | of desiccant added another will promote the reaction. |
| solvent vapor pressure because of the role of | | | | This type of ink can be printed out shiny thick ink |
| diffusion in the atmosphere, in the ink film formed on | | | | film printed. The good adhesion, the ink film |
| the surface membrane, then through the liquid film | | | | toughness. Defects is slow drying at room |
| evaporation. | | | | temperature, at least 2 hours, 80 heat baking |
| In this process, the ink surface, its viscosity due to | | | | required half an hour, the storage surface is easy to |
| solvent evaporation must increase, also due to | | | | produce ink film. This printing ink coating applied to |
| solvent evaporation, heat diffusion, the temperature | | | | metal, hard plastic, wood, paper, cloth and so on. |
| drops, the viscosity to rise again. The result is a | | | | B, heat curing ink. After that printing can take place |
| volatile solvent within the ink film become more and | | | | by heating the ink curing condensation reaction. This |
| more difficult and, when dry, requiring heat and wind. | | | | ink is also used for epoxy resin binders, but with two |
| Solvent kinetic energy can active the surface of the | | | | different liquid epoxy ink, the ink is a liquid containing |
| ink viscosity reduction, to accelerate the solvent | | | | the catalyst ink, can be cured under the heat. The |
| evaporation have a good effect. In addition, the ink | | | | advantage is a liquid type, solvent, heated front |
| surface, evaporation layer (film) if stagnant, it will | | | | viscosity stability, and printed materials adhesion |
| hinder volatile, and therefore air, blew away the gas | | | | fastness and resistance tolerance good; drawback is |
| film, to speed up the drying. | | | | energy consumption. The ink curing speed depends |
| General, solvent evaporation rate from the solvent | | | | on the content of the catalyst and heating |
| vapor pressure, solvent and air temperature | | | | temperature. Without catalyst, the ink needs to |
| difference and air flow in the surface speed of the | | | | higher than 150 high temperature curing, after adding |
| decision. Of course, this ink, the solvent evaporation | | | | the catalyst can be cured in temperatures, but the |
| rate addition to the above factors, we will also | | | | catalyst content of large, adverse save ink. |
| dissolve the resin due to the type and concentration | | | | |