Printing ink is a paste colloid that is uniformly mixed with components such as colorants, binders, and fillers. As a viscous liquid ink, due to the different properties of its varieties are also different, that is, there are thick and thin points, differences in viscosity, fast dry and slow dry, and so on. Therefore, the correct understanding and understanding of the role of ink components in the ink, for the characteristics of accurate high-speed ink, to meet the appropriateness of various printing conditions, improve product printing quality is of great significance.
First, the role of pigments in ink pigments include pigments and dyes. The colored materials used in printing inks are usually pigments, but also some dyes. They are all very fine colored materials. Pigments are generally insoluble in water and do not dissolve in the binder. Most of the solution is suspended in the solution, and the dye is generally soluble in the binder. Pigments have a great influence on the performance of inks. The relative density, transparency, heat resistance, light resistance, and resistance to chemicals of inks are all related to pigments. The role of pigment in the ink is obvious, its color determines the hue of the ink; its amount determines the concentration of the ink, its use gives the ink a certain consistency and other physical properties; its use gives the ink a certain amount of Consistency and other physical properties; its use to a certain extent, affecting the drying of the ink, the oxidative polymerization and drying of the ink is particularly prominent. In addition, the durability of the ink in all aspects is also determined by the pigment. Therefore, due to the variety of inks and their different uses, the use of pigments is also different. This requires the use of suitable inks according to the product application and process characteristics when printing. For example, high-speed multicolor printers should be used to package products with bright light. , fast solid, wear resistant inks to ensure print quality.
Second, the role of the link material in the ink The link material is a liquid with a certain viscosity, viscosity, its role is many. As a carrier of the pigment, solid particles such as a powdery pigment are mixed and connected so that the phase-adhered pigment finally adheres to the print. The binder affects and determines the fixing speed, drying speed, and drying type of the ink, while giving the ink a certain degree of physical properties such as gloss, abrasion resistance, yellowing resistance, and impact resistance, and to a large extent Determines the viscosity, viscosity, yield value and flowability of inks. Therefore, high-quality inks originate from high quality binders. If the linking material preparation or production process is unsatisfactory, the ink will not only lack vivid colors and good luster after printing, but it will also cause chain quality problems such as pasting, smudging, strike-through, pull-off and non-inking, and normal printing. Bring some obstacles. Therefore, the binder is a factor that affects the quality of the ink.
Third, the role of filler in the ink Filler is a white solid material that can be uniformly and well dispersed in the binder, in a fine powder. When the fillers are slurried after mixing and grinding in the binder, some are transparent and others are opaque. Commonly used fillers are aluminum hydroxide, potassium sulfate, magnesium carbonate and calcium carbonate. Filler in the ink on the one hand can play a role in adjusting the ink consistency, viscosity, viscosity, fluidity and yield value of ink; on the other hand can play a role in adjusting the ink concentration, that is, when the ink concentration, hue In deep conditions, dilute effects can be achieved by adding fillers. Filler in the ink although there is a side to play a role, but its performance has many requirements consistent with the pigment, it also plays an important role in the drying effect of the oxidative polymerization drying ink.
Fourth, the role of additives in the ink For the print operator, the ink printability is good, open the lid can be put into use, of course, is the most convenient and easy. However, due to the differences in the temperature and humidity of the printing environment, the characteristics of the printing materials, and the printing process conditions, such as the moisture content of the paper, the PH value, the speed of the printing press, the overprinting method, etc., and although the ink varieties are various, each The proportion of pigments, binders, and fillers used in the inks is almost constant and often cannot meet the printability requirements for various conditions. 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 oil transfer. The commonly used varnish is No. 6 and No. 0. No. 6 varnish is used to increase the fluidity of the ink, improve the ink transferability, and reduce the ink's concentration viscosity and drying properties. 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 detackifiers. Detackifier is a wax-like paste mixture with loose texture and lubricity. The proper amount of added ink can reduce the viscosity of the ink, reduce the paper pull-out and powder fall-off, and improve the uniformity of the ink.
3, the role of anti-stick Liu. Overprinting is a common fault in the color printing process. After adding an appropriate amount of an anti-sticking agent in the ink, it can prevent back-scratching caused by the ink layer being dry during the stacking of the ink sheet, thereby ensuring product quality.
4, the role of additives. It is a kind of white transparent paste material. After proper amount of ink is added, it can eliminate the phenomenon of paper lint and powder off, so as to prevent the occurrence of chewing on the layout and blanket dust.
5, the role of withdrawal agent. Dilution agent is a paste-like transparent material, has good gloss and good printing performance, adding color ink 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, and 1-5% of anti-friction agent is added to the printing ink, which can improve the abrasion resistance of the printing ink layer and reduce the viscosity of the ink. .
7, the role of dry agent. After adding the ink, the anti-drying agent can inhibit the oxidation and polymerization of the ink and slow down the drying 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 is divided into two kinds of white dry oil and red dry oil. Red dry oil is a kind of desiccant based on cobalt naphthalate. It is a purple-red paste liquid and is suitable for adding in dark ink. The dry form is based on the dryness of the ink layer. The dosage is 1- Between 2%. White dry oil is a mixture of cobalt, manganese, and lead metal salts, commonly known as mixed dry oil, with a full rinsing effect inside and outside the ink film, the dryness is not a strong red dry oil, but the drying effect is better, It is white translucent and has no effect on hue after adding light ink.
9, the role of light oil. In addition to the gloss oil used in polishing, the relief printing ink adds a certain amount of bright oil, you can increase the ink fluidity, is conducive to uniform ink, and can greatly improve the brightness of the printing ink film, the ink layer Has a good effect of wear resistance, light resistance and fading prevention. Due to the bright oil conjunctiva block, the drying speed of the printing ink layer is also increased after the ink is added. Therefore, this condition should be fully taken into account when the ink is transferred.
In short, the ink composition and auxiliary materials constitute the basis for inks and imprints, understand and master this knowledge, understand the performance of inks and methods of use, improve the printing efficiency and product quality, and avoid blindness in the operation process. It is of great significance. (Kang Qilai) ("China Packaging News")
First, the role of pigments in ink pigments include pigments and dyes. The colored materials used in printing inks are usually pigments, but also some dyes. They are all very fine colored materials. Pigments are generally insoluble in water and do not dissolve in the binder. Most of the solution is suspended in the solution, and the dye is generally soluble in the binder. Pigments have a great influence on the performance of inks. The relative density, transparency, heat resistance, light resistance, and resistance to chemicals of inks are all related to pigments. The role of pigment in the ink is obvious, its color determines the hue of the ink; its amount determines the concentration of the ink, its use gives the ink a certain consistency and other physical properties; its use gives the ink a certain amount of Consistency and other physical properties; its use to a certain extent, affecting the drying of the ink, the oxidative polymerization and drying of the ink is particularly prominent. In addition, the durability of the ink in all aspects is also determined by the pigment. Therefore, due to the variety of inks and their different uses, the use of pigments is also different. This requires the use of suitable inks according to the product application and process characteristics when printing. For example, high-speed multicolor printers should be used to package products with bright light. , fast solid, wear resistant inks to ensure print quality.
Second, the role of the link material in the ink The link material is a liquid with a certain viscosity, viscosity, its role is many. As a carrier of the pigment, solid particles such as a powdery pigment are mixed and connected so that the phase-adhered pigment finally adheres to the print. The binder affects and determines the fixing speed, drying speed, and drying type of the ink, while giving the ink a certain degree of physical properties such as gloss, abrasion resistance, yellowing resistance, and impact resistance, and to a large extent Determines the viscosity, viscosity, yield value and flowability of inks. Therefore, high-quality inks originate from high quality binders. If the linking material preparation or production process is unsatisfactory, the ink will not only lack vivid colors and good luster after printing, but it will also cause chain quality problems such as pasting, smudging, strike-through, pull-off and non-inking, and normal printing. Bring some obstacles. Therefore, the binder is a factor that affects the quality of the ink.
Third, the role of filler in the ink Filler is a white solid material that can be uniformly and well dispersed in the binder, in a fine powder. When the fillers are slurried after mixing and grinding in the binder, some are transparent and others are opaque. Commonly used fillers are aluminum hydroxide, potassium sulfate, magnesium carbonate and calcium carbonate. Filler in the ink on the one hand can play a role in adjusting the ink consistency, viscosity, viscosity, fluidity and yield value of ink; on the other hand can play a role in adjusting the ink concentration, that is, when the ink concentration, hue In deep conditions, dilute effects can be achieved by adding fillers. Filler in the ink although there is a side to play a role, but its performance has many requirements consistent with the pigment, it also plays an important role in the drying effect of the oxidative polymerization drying ink.
Fourth, the role of additives in the ink For the print operator, the ink printability is good, open the lid can be put into use, of course, is the most convenient and easy. However, due to the differences in the temperature and humidity of the printing environment, the characteristics of the printing materials, and the printing process conditions, such as the moisture content of the paper, the PH value, the speed of the printing press, the overprinting method, etc., and although the ink varieties are various, each The proportion of pigments, binders, and fillers used in the inks is almost constant and often cannot meet the printability requirements for various conditions. 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 oil transfer. The commonly used varnish is No. 6 and No. 0. No. 6 varnish is used to increase the fluidity of the ink, improve the ink transferability, and reduce the ink's concentration viscosity and drying properties. 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 detackifiers. Detackifier is a wax-like paste mixture with loose texture and lubricity. The proper amount of added ink can reduce the viscosity of the ink, reduce the paper pull-out and powder fall-off, and improve the uniformity of the ink.
3, the role of anti-stick Liu. Overprinting is a common fault in the color printing process. After adding an appropriate amount of an anti-sticking agent in the ink, it can prevent back-scratching caused by the ink layer being dry during the stacking of the ink sheet, thereby ensuring product quality.
4, the role of additives. It is a kind of white transparent paste material. After proper amount of ink is added, it can eliminate the phenomenon of paper lint and powder off, so as to prevent the occurrence of chewing on the layout and blanket dust.
5, the role of withdrawal agent. Dilution agent is a paste-like transparent material, has good gloss and good printing performance, adding color ink 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, and 1-5% of anti-friction agent is added to the printing ink, which can improve the abrasion resistance of the printing ink layer and reduce the viscosity of the ink. .
7, the role of dry agent. After adding the ink, the anti-drying agent can inhibit the oxidation and polymerization of the ink and slow down the drying 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 is divided into two kinds of white dry oil and red dry oil. Red dry oil is a kind of desiccant based on cobalt naphthalate. It is a purple-red paste liquid and is suitable for adding in dark ink. The dry form is based on the dryness of the ink layer. The dosage is 1- Between 2%. White dry oil is a mixture of cobalt, manganese, and lead metal salts, commonly known as mixed dry oil, with a full rinsing effect inside and outside the ink film, the dryness is not a strong red dry oil, but the drying effect is better, It is white translucent and has no effect on hue after adding light ink.
9, the role of light oil. In addition to the gloss oil used in polishing, the relief printing ink adds a certain amount of bright oil, you can increase the ink fluidity, is conducive to uniform ink, and can greatly improve the brightness of the printing ink film, the ink layer Has a good effect of wear resistance, light resistance and fading prevention. Due to the bright oil conjunctiva block, the drying speed of the printing ink layer is also increased after the ink is added. Therefore, this condition should be fully taken into account when the ink is transferred.
In short, the ink composition and auxiliary materials constitute the basis for inks and imprints, understand and master this knowledge, understand the performance of inks and methods of use, improve the printing efficiency and product quality, and avoid blindness in the operation process. It is of great significance. (Kang Qilai) ("China Packaging News")
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