Global green printing urgently needs environmental protection ink

With the vigorous development of industrial production in various countries and the general improvement of people’s living standards, the increasingly polluted environment of the Earth and the atmosphere that mankind lives on is threatening the quality of human life and even the survival of mankind itself. The printing industry occupies an important position in the national economy. Brilliant and colorful prints bring civilization to humanity, but also cause environmental pollution, reduce or completely eliminate the pollution of the E-brush to the environment, and make printing into green printing, and will become The historical mission of future generations or even generations of printers.

The development of the printing industry is closely related to the development of printing inks. The environmental pollution of traditional solvent inks is obvious to all. Therefore, all countries in the world have paid great attention to the development of environmentally friendly inks. China is no exception. New printing ink printing materials and accessories without pollution and pollution are increasingly being developed and applied. Green printing is increasingly becoming the consensus and joint action of the printing industry.

First, the composition and classification of ink

It is well known that printing is the process of transferring graphics on a printing plate to a substrate via ink, so the role of the ink is extremely important. The main components of inks are pigments and binders. There are also additives.

The pigment plays a role in color development. Its main properties such as the degree of dispersion and the hiding power of the tinctorial force have a direct influence on the performance of the ink. Ink pigments are divided into organic pigment inorganic pigments and special pigments (such as gold powder, silver fluorescent pigments, phosphorescent pigments) used in special printing, etc., and the use of special pigments in packaging and printing is currently on a linear upward trend.

The complex composition of the binders plays a key role in the inks, and there is an oil type binder resin type binder. The oil type binder has good adhesion and certain resistance properties to form a good gloss ink film. The resin type binder is made by dissolving synthetic resin or modified resin in mineral oil vegetable oil or volatile agent. The organic solvent is one of the main components in the binder, and its role is to make the ink have a certain degree of fluidity. After the ink is transferred to the substrate, the volatile solvent quickly evaporates and the less volatile solvent penetrates into the substrate so that the pigment particles and the binder adhere to the surface of the substrate and dry. Commonly used ink solvents are petroleum solvents. Alcohol solvents and ester solvents. Additives, or additives, are auxiliary components of the ink. Used to adjust the printability of the ink. Auxiliaries are divided into color adjuster fluidity modifier drying modifiers, etc.

The ink classification method is various and one of the main classification methods according to the use classification can be divided into letterpress (including flexography) offset gravure, special ink and new ink.

Toppan inks have dramatically decreased with changes in the proportion of letterpress prints, but Flexo Toppan inks have stood out, and the share of flexographic printing is gradually increasing. Flexo printing ink is divided into solvent type ink, ink and UV ink. The two inks are becoming the focus of development due to their excellent environmental performance.

Offset inks must have strong coloring power and a certain degree of resistance. Most of the use of resin type material. Offset inks have quick-drying bright offset inks and web offset inks. The former is suitable for sheet-fed high-speed color E-brushes, while the latter is used for E-rotary web presses with a speed of 250-300,000 rotations per hour, divided into two types, thermosetting and cold-setting. Thermosetting offset inks are suitable for color printing. Coldset offset inks have low viscosity and are suitable for printing newsprint and offset paper.

Block printing inks are divided into engraved azole plate and gravure plates. Engraving gravure printing ink is mainly used for the printing of valuable securities, its linking material uses the oil viscosity material with lower viscosity, gravure printing ink relies on the solvent to volatilize to dry. For low viscosity inks. Divided into benzene type. Gasoline-type hybrid. Alcohol type and water-based five kinds. Benzene type gravure ink b. Toluene and xylene are solvents. Add cosolvent benzene during printing to adjust the drying speed. Its advantage is strong adhesion. Film formation of a good ink film gloss, but toxic, and people and atmospheric pollution. Gasoline gravure ink b' gasoline is a solvent. For low toxicity ink. Mixed gravure inks and alcohol gravure inks are less toxic or less toxic. Little pollution to the environment. The amount is rising sharply. The solvent of the water-based gravure ink is water and a small amount of alcohol. The quality of printed products is gradually increasing. People are generally optimistic and have broad prospects for development.

Special ink refers to ink specially formulated for special printing. New inks are inks newly developed according to market demand. Currently. UV ink has very good environmental protection. It is recognized as an ideal green ink.

With the vigorous development of industrial production in various countries and the general improvement of people’s living standards, the increasingly polluted environment of the Earth and the atmosphere that mankind lives on is threatening the quality of human life and even the survival of mankind itself. The printing industry occupies an important position in the national economy. Brilliant and colorful prints bring civilization to humanity, but also cause environmental pollution, reduce or completely eliminate the pollution of the E-brush to the environment, and make printing into green printing, and will become The historical mission of future generations or even generations of printers.

The development of the printing industry is closely related to the development of printing inks. The environmental pollution of traditional solvent inks is obvious to all. Therefore, all countries in the world have paid great attention to the development of environmentally friendly inks. China is no exception. New printing ink printing materials and accessories without pollution and pollution are increasingly being developed and applied. Green printing is increasingly becoming the consensus and joint action of the printing industry.

First, the composition and classification of ink

It is well known that printing is the process of transferring graphics on a printing plate to a substrate via ink, so the role of the ink is extremely important. The main components of inks are pigments and binders. There are also additives.

The pigment plays a role in color development. Its main properties such as the degree of dispersion and the hiding power of the tinctorial force have a direct influence on the performance of the ink. Ink pigments are divided into organic pigment inorganic pigments and special pigments (such as gold powder, silver fluorescent pigments, phosphorescent pigments) used in special printing, etc., and the use of special pigments in packaging and printing is currently on a linear upward trend.

The complex composition of the binders plays a key role in the inks, and there is an oil type binder resin type binder. The oil type binder has good adhesion and certain resistance properties to form a good gloss ink film. The resin type binder is made by dissolving synthetic resin or modified resin in mineral oil vegetable oil or volatile agent. The organic solvent is one of the main components in the binder, and its role is to make the ink have a certain degree of fluidity. After the ink is transferred to the substrate, the volatile solvent quickly evaporates and the less volatile solvent penetrates into the substrate so that the pigment particles and the binder adhere to the surface of the substrate and dry. Commonly used ink solvents are petroleum solvents. Alcohol solvents and ester solvents. Additives, or additives, are auxiliary components of the ink. Used to adjust the printability of the ink. Auxiliaries are divided into color adjuster fluidity modifier drying modifiers, etc.

The ink classification method is various and one of the main classification methods according to the use classification can be divided into letterpress (including flexography) offset gravure, special ink and new ink.

Toppan inks have dramatically decreased with changes in the proportion of letterpress prints, but Flexo Toppan inks have stood out, and the share of flexographic printing is gradually increasing. Flexo printing ink is divided into solvent type ink, ink and UV ink. The two inks are becoming the focus of development due to their excellent environmental performance.

Offset inks must have strong coloring power and a certain degree of resistance. Most of the use of resin type material. Offset inks have quick-drying bright offset inks and web offset inks. The former is suitable for sheet-fed high-speed color E-brushes, while the latter is used for E-rotary web presses with a speed of 250-300,000 rotations per hour, divided into two types, thermosetting and cold-setting. Thermosetting offset inks are suitable for color printing. Coldset offset inks have low viscosity and are suitable for printing newsprint and offset paper.

Block printing inks are divided into engraved azole plate and gravure plates. Engraving gravure printing ink is mainly used for the printing of valuable securities, its linking material uses the oil viscosity material with lower viscosity, gravure printing ink relies on the solvent to volatilize to dry. For low viscosity inks. Divided into benzene type. Gasoline-type hybrid. Alcohol type and water-based five kinds. Benzene type gravure ink b. Toluene and xylene are solvents. Add cosolvent benzene during printing to adjust the drying speed. Its advantage is strong adhesion. Film formation of a good ink film gloss, but toxic, and people and atmospheric pollution. Gasoline gravure ink b' gasoline is a solvent. For low toxicity ink. Mixed gravure inks and alcohol gravure inks are less toxic or less toxic. Little pollution to the environment. The amount is rising sharply. The solvent of the water-based gravure ink is water and a small amount of alcohol. The quality of printed products is gradually increasing. People are generally optimistic and have broad prospects for development.

Special ink refers to ink specially formulated for special printing. New inks are inks newly developed according to market demand. Currently. UV ink has very good environmental protection. It is recognized as an ideal green ink.

Reprinted from: 21st Century Fine Chemicals Network