The so-called "inkjet" is a non-contact, pressureless, non-printing printing technology. The information stored in the electronic computer is input into an ink jet printer, which has the common feature of digital printing without printing, and can realize variable information printing.
There are more than 20 ink-jet printing methods, the basic principle is to produce a small drop of ink, and then lead to the set position, can be summarized into continuous and on-demand two. The so-called continuous inkjet, regardless of imprinted or non-printed type, produces droplets in a continuous manner, and then the non-printed droplets are recovered or dispersed; on-demand inkjet only produces droplets in the imprinted portion. . Inkjet printing can be divided into black and white inkjet and color inkjet according to the printing color. Black and white inkjet printing uses a single ink, the machine structure and the ink system are relatively simple, and color inkjet printing is relatively complicated. At present, the resolution of inkjet printing can reach 40 dots/mm, and the quality is close to that of a photographic image.
There are two main types of equipment, one is high-speed printing type, and the other is high-quality color proofing type. The reason why the number of suppliers of continuous inkjet printers is limited is that inkjet heads must be manufactured by companies that can provide complete solutions. On-demand inkjet is different. There are many inkjet head OEM suppliers on the market. On-demand inkjet heads can be manufactured in large quantities, and continuous inkjet heads are more complex and difficult to mass-produce.
In digital printing, inkjet has a 5% market share. However, inkjet printing is also constrained by some factors in its development. At present, there are mainly the following factors that affect the quality of inkjet printing.
1. Color conversion.
How to accurately convert the color of the light source (R, G, B) to the inkjet or printing system (C, M, Y, K) is very complicated, therefore, accurate color conversion technology is an important key to influencing the quality of inkjet printing.
2. Resolution.
In black and white ink jet printers, the higher the resolution, the finer the resolution and the color scale points, and the better the print quality. But for color inkjet printers, the resolution refers to how many ink dots can be printed on a one-inch width, regardless of whether ink dots overlap.
3. Levels.
At present, the ink jet printing technology can accurately control the ink droplet color scale, and the control of the color ink from the same position is not sprayed to spray one drop until it sprays 16 drops.
4. Print head control.
The dots of ink are sprayed onto the paper through nozzles. The nozzles and the print heads are together, so the technology of the print head itself is very important.
5. Ink.
The ink used for ink-jet printing is a special-purpose ink with a moderate viscosity, and is non-toxic, stable, does not clog the nozzle, has good moisture retention, good jetting properties, and does not corrode the metal components of the head. At present, ink-jet inks are mostly dye-based inks. The ink of the ink-jet printer must have sufficient surface tension to prevent the ink from spattering when ejected. In addition, the ink must be fast-drying to prevent haziness on the paper. Therefore, the ink itself is also one of the factors that affect the print quality.
6. Substrate material.
Inkjet printing paper requires paper with a smooth surface and a certain degree of sizing. The sprayed ink evaporates and dries. The ink dots are round, and the printed letters are clear and the graphics are beautiful. Color inkjet printing paper, preferably with a thin layer of transparent coating on the surface, can absorb ink quickly and avoid light scattering.
At present, digital proofing has been mostly achieved by inkjet, and its advantages in large-format printing are increasingly evident, and it has begun to march into the field of packaging and printing. Major printing machine manufacturers all over the world have been committed to the further improvement and development of inkjet printing technology, the development of better printing materials, the study of new ink compositions, the change of inkjet technology... and continuous innovation.
There are more than 20 ink-jet printing methods, the basic principle is to produce a small drop of ink, and then lead to the set position, can be summarized into continuous and on-demand two. The so-called continuous inkjet, regardless of imprinted or non-printed type, produces droplets in a continuous manner, and then the non-printed droplets are recovered or dispersed; on-demand inkjet only produces droplets in the imprinted portion. . Inkjet printing can be divided into black and white inkjet and color inkjet according to the printing color. Black and white inkjet printing uses a single ink, the machine structure and the ink system are relatively simple, and color inkjet printing is relatively complicated. At present, the resolution of inkjet printing can reach 40 dots/mm, and the quality is close to that of a photographic image.
There are two main types of equipment, one is high-speed printing type, and the other is high-quality color proofing type. The reason why the number of suppliers of continuous inkjet printers is limited is that inkjet heads must be manufactured by companies that can provide complete solutions. On-demand inkjet is different. There are many inkjet head OEM suppliers on the market. On-demand inkjet heads can be manufactured in large quantities, and continuous inkjet heads are more complex and difficult to mass-produce.
In digital printing, inkjet has a 5% market share. However, inkjet printing is also constrained by some factors in its development. At present, there are mainly the following factors that affect the quality of inkjet printing.
1. Color conversion.
How to accurately convert the color of the light source (R, G, B) to the inkjet or printing system (C, M, Y, K) is very complicated, therefore, accurate color conversion technology is an important key to influencing the quality of inkjet printing.
2. Resolution.
In black and white ink jet printers, the higher the resolution, the finer the resolution and the color scale points, and the better the print quality. But for color inkjet printers, the resolution refers to how many ink dots can be printed on a one-inch width, regardless of whether ink dots overlap.
3. Levels.
At present, the ink jet printing technology can accurately control the ink droplet color scale, and the control of the color ink from the same position is not sprayed to spray one drop until it sprays 16 drops.
4. Print head control.
The dots of ink are sprayed onto the paper through nozzles. The nozzles and the print heads are together, so the technology of the print head itself is very important.
5. Ink.
The ink used for ink-jet printing is a special-purpose ink with a moderate viscosity, and is non-toxic, stable, does not clog the nozzle, has good moisture retention, good jetting properties, and does not corrode the metal components of the head. At present, ink-jet inks are mostly dye-based inks. The ink of the ink-jet printer must have sufficient surface tension to prevent the ink from spattering when ejected. In addition, the ink must be fast-drying to prevent haziness on the paper. Therefore, the ink itself is also one of the factors that affect the print quality.
6. Substrate material.
Inkjet printing paper requires paper with a smooth surface and a certain degree of sizing. The sprayed ink evaporates and dries. The ink dots are round, and the printed letters are clear and the graphics are beautiful. Color inkjet printing paper, preferably with a thin layer of transparent coating on the surface, can absorb ink quickly and avoid light scattering.
At present, digital proofing has been mostly achieved by inkjet, and its advantages in large-format printing are increasingly evident, and it has begun to march into the field of packaging and printing. Major printing machine manufacturers all over the world have been committed to the further improvement and development of inkjet printing technology, the development of better printing materials, the study of new ink compositions, the change of inkjet technology... and continuous innovation.
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