The role of various additives in ink

For the print operator, the printability of the ink is good and can be put into use once the lid is opened, which of course is the most convenient and convenient. However, due to differences in temperature and humidity in the printing environment, characteristics of printing materials, and different printing process conditions, such as the paper's moisture content, PH value, printer speed, and overprinting methods, the ink types are varied, but each The proportion of pigments, binders, and fillers used in the ink is almost constant, and the printability requirements for various conditions are not always satisfied. Therefore, from the perspective of improving printing efficiencies and quality, according to the changing printing conditions, proper addition of additives in selected inks is beneficial to ensuring normal printing.

1. The role of varnish The commonly used varnish has No. 6 and No. 0. No. 6 varnish is used to increase the fluidity of the ink, improve the transferability of the ink, and reduce the concentration, viscosity, and drying of the ink. No. 0 oil has a larger viscosity. When the viscosity of the ink is insufficient to cause the ink to be printed or the ink is not good, the proper amount of No. 0 oil is loosened and added to the ink, which can increase the viscosity and adhesion of the ink.

2. The role of detackifier Detackifier is a wax-like paste mixture, loose texture and lubrication, the amount of ink added to reduce the viscosity of the ink, reduce the paper pull paper hair, powder off the ills, and can improve the uniformity of cloth ink .

3. The role of anti-sticking agent Blotting is the common failure of the color printing process. After adding an appropriate amount of anti-sticking agent to the ink, it can prevent the printed back sheet from causing dirt on the back due to the ink layer being dry, thus ensuring product quality.

4. The role of additives It is a kind of white transparent paste material, after adding the right amount of ink, it can eliminate paper lint, powder off phenomenon, in order to prevent the layout, blanket dust piled out of the paste.

5. The role of the lighter The lighter is a paste-like transparent material with good gloss and good printing performance. After adding color ink, it can dilute the hue of the ink printing process effect.

6. The role of anti-friction agent It is a wax paste made of polyethylene wax and high-boiling point kerosene. Adding 1%-5% rubbing agent to the printing ink can improve the abrasion resistance of the printing ink layer, and can reduce The viscosity of the ink reduces the opportunity for sticking.

7. The role of anti-drying agent Drying agent added to the ink can play a role in inhibiting ink oxidation, polymerization, and slow down the drying rate of the ink conjunctiva. Spraying the anti-drying agent on the ink transfer roller, such as the ink roller, can play a role in stopping the drying and bring convenience to the printing stoppage and printing.

8. The role of desiccant Desiccant white dry oil and red dry oil two. Red dry oil is a desiccant based on cobalt naphthalate. It is a purple-red paste liquid and is suitable for adding in dark ink. Its dry form is mainly based on the surface of the ink layer. The dosage is 1%. -2% between. White dry oil is a mixture of cobalt, manganese, and lead metal salts, commonly known as mixed dry oil, with a full-drying role inside and outside the ink film, the dryness is not strong red dry oil, but the drying effect is better, and It is white translucent and has no effect on hue after the addition of light ink.

9. The role of bright oil In addition to gloss oil used in polishing, the relief printing ink adds the right amount of bright oil, can increase the ink's fluidity, is conducive to uniform ink, and can greatly improve the printing ink film The brightness, so that the ink layer has a certain degree of wear, light and prevent the fading of good effect. Because the bright oil is fast, the ink drying speed is also increased after the ink is added. Therefore, this should be fully taken into account when the ink is transferred.