Additional material is added in the manufacture of ink, and in printing, to improve the performance of the ink itself. The ink prepared by the basic composition can not meet the requirement in some aspects, or because of the change of conditions and can not meet the requirements of printing, it is necessary to add a small amount of auxiliary material to solve it.There are many additives, such as desiccant, anti drying agent, diluting agent, removing viscosity agent, plasticizer and so on
Fillers are white, transparent, translucent, or poorly defined powdery substances. Mainly from filling, filling pigments, appropriate use of these fillers can reduce the amount of the pigment, reduce the cost, but also can adjust the ink properties, such as dense, liquidity, but also improve the flexibility of the formulation design.
The binder is the main component of the ink, which acts as a dispersing pigment, gives the ink proper adhesion, fluidity and transfer properties, and the effect of the pigment on the surface of the printed matter by film forming after printing. Connection is commonly known as inking oil.The connection material can be made from a variety of materials, such as dry vegetable oil, most can be used to make the connection material of the ink, mineral oil can also be made of binder, solvent and water, and all kinds of synthetic resin can be used to made connectionmaterial.Rheological property, viscosity, neutral, acid value, color, water resistance and ink printing performance mainly depends on the connecting material, the same kind of paint used to connect different materials, can be made of different types of ink; and the same kind of connection, the use of different pigments. The ink is still of the same type, because it can not change the basic properties of ink, so the quality of the ink, in addition to the pigment, depends mainly on the connection material.
Pigment plays a coloring role in printing ink, and it has a direct influence on some characteristics of ink.Pigments are color, black or white high dispersion powders that are insoluble in water and organic solvents. They are classified into two broad categories: organic pigments and inorganic pigments according to their origins and chemical composition.Inorganic pigments are the oxides of nonferrous metals or some metallic insoluble salts. Inorganic pigments are classified into natural inorganic pigments and synthetic inorganic pigments, and inorganic pigments are mineral pigments.Organic pigments are colored organic compounds and are divided into two main categories: natural and synthetic. Now commonly used is synthetic organic pigment, organic pigment varieties, more color, complete, better than inorganic pigment.Dyes are organic compounds, it is soluble in water, sometimes dissolved in organic solvent, preparation of insoluble color precipitate from some kind of dye, called lake pigments, for the manufacture of printing inks.The use of printing ink pigment demanding, especially color dispersion lightofferings transparency requirements, the hue of the color pigments to spectral color, saturation should be as large as possible, the tricolor ink magenta, green, yellow pigment transparency must be high, all the paint should not only water, but also to quickly and even with the connection material, the oil absorption capacity of the pigment should not be too large, the best pigments with alkali, acid, alcohol resistance and resistance potential performance.
