Introduction to the composition of the hottest ink

2022-08-12
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Introduction to the composition of inks

inks are composed of pigments, connecting materials, fillers, additives, etc

(1) pigment

pigment plays a role in color rendering in ink, and it has a direct impact on some characteristics of ink

pigments are colored, black or white powders with high dispersion that are insoluble in water and organic solvents. According to their source and chemical composition, they are divided into organic pigments and inorganic pigments

① inorganic pigments are oxides of non-ferrous metals or metal salts insoluble in some metals. Inorganic pigments are divided into natural inorganic pigments and artificial inorganic pigments. Natural inorganic pigments are mineral pigments

② organic pigments are colored organic compounds, which are also divided into two categories: natural and easy to use and synthetic. At present, synthetic organic pigments are commonly used. There are many kinds of organic pigments with complete colors and better performance than inorganic pigments

dyes are organic compounds, which are soluble in water and sometimes in organic solvents. Insoluble color precipitates, called lake pigments, can be prepared from certain dyes for the manufacture of printing inks

the requirements for pigments used in printing inks are quite high, especially color, dispersion, light resistance, transparency, etc. the hue of color pigments is required to be close to the spectral color, and the saturation should be as large as possible. The transparency of magenta, cyan and yellow pigments used in trichromatic inks must be high. All pigments should not only be water resistant, but also be quickly and evenly combined with connecting materials, and the oil absorption capacity of pigments should not be too large, Pigments should preferably have alkali resistance, acid resistance, alcohol resistance and potential resistance

(2) connecting material

connecting material is the main component that can protect the ink in the process of processing and using functional plastics. It plays a role in dispersing the pigment, giving the ink proper adhesion, fluidity and transfer performance, and fixing the pigment on the surface of the printed matter through film-forming after printing. Connecting material is commonly known as inking oil

connecting materials can be made of various substances, such as various dry vegetable oils, most of which can be used to make connecting materials for ink, mineral oil can also be used to make connecting materials, solvents and water, and various synthetic resins can be used to make connecting materials

the rheology, viscosity, neutrality, acid value, color, water resistance and printing performance of ink mainly depend on the connecting materials. The same pigment can be made into different types of inks by using different connecting materials; Different pigments are used for the same binder. The ink made is still the same type, because it can not change the fundamental performance of the ink, so the quality of the ink, in addition to pigments, mainly depends on the connecting material. 2. Emergency stop device: it can deal with emergencies

(3) filler

the filler is white, transparent, translucent or unsightly powdery material. It mainly plays the role of filling, filling the pigment part. The proper use of some fillers can not only reduce the amount of pigment and reduce the cost, but also adjust the properties of the ink, such as thickening, fluidity, etc. (8) cover the machine with a dust cover after the experiment High formula design flexibility

(4) additives

additives are some materials added to improve the performance of the ink itself in ink manufacturing and printing. When the ink prepared according to the basic composition still cannot meet the requirements in some characteristics, or cannot meet the requirements for printing use due to changes in conditions, a small amount of auxiliary materials must be added to solve the problem

there are many additives, such as desiccant, anti desiccant, diluent, adhesive remover, plasticizer, etc

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