Offset printing ink requirements has the following characteristics: 

1 ink to high transparency. Thin film coating into uniform ink, the requirement of bearing of the monlchamus membrane material background to display more clearly, ink transparency requirements higher. Ink on paper color has three kinds of forms: 

1 in the form of solid and dot, dot, field (that is, 100% dot) on the recovery of the sun light as selective absorption and reflection, and presented the color. 

The monochrome dot coordinate and superimposed to show: two independent outlets are mutually parallel or overlapping colors on paper. 

The parallel color dot stack: the two kinds of color dot on paper overlapping color display. Such as yellow and blue when the two colors to overprint shows that green hue. 

2 the requirements of delicate ink pigment particles. Especially the printed album. Calendars, landscapes and so on high precision printing, fine particles of the ink, fine pigment particles to printing out fine printing products. 

3 strong tinting strength of offset printing ink. Color is an ink color intensity or concentration, for the same color ink, color depends on: 

The dispersion of pigments in binders of. The higher the degree of dispersion, coloring is stronger. 

It depends on the content of pigment. The higher the concentration, the stronger the colored. 

4 printing ink with light characteristics. Offset printing ink color under the sun, light with light, by the light ink fade, easy to color as far as possible to the extent slow, outdoor advertising of printing products after the weather most likely to fade. The color is yellow, red two colors, blue and black two colors, color fading is relatively slow, solve the yellow and red two colors fade, color, is the key to improve the quality of the printing products. 

5 offset printing ink color and high efficiency. Efficiency is a comprehensive index of gray and color ink, offset printing ink requires color hue to pure, no color deviation, no noise. 

The chemical characteristics of 6 offset printing ink can be stable. Ink color in some chemicals will change, especially the acid, alkali, salt, oxidation agent of pigment in the ink will be a certain chemical reaction, often easy to change color. Therefore, it is required that the offset ink has better chemical stability. 

Offset printing is a way of printing, printing ink to have water resistance and anti - emulsifying properties. 

Water for offset printing. In the bucket to join the PS version of wetting powder. Offset wetting powder has the following characteristics: 

Can fully wetting PS layout, reduce the surface tension. Surfactants, wetting agents, surfactants. 

With the ability to clean acid to add acid. 

It has a very good sense of ability not to join the Arabia gum resin. 

The stable pH value to buffer solvent. 

It can change for different climate to add moisture absorption agent. So the album printing PS version of the wetting powder is a variety of chemical composition of high-tech products, the requirements of the ink has a stable chemical properties.