Printer ink classification
1, if according to the color base classification, ink can be divided into:
Dye-type inks, which are dye-based inks, are also the inks used by most inkjet printers today.
Pigment ink - ink based on pigments.
2, if the ink is in accordance with the solvent to distinguish, it is divided into:
Water-based inks - The main component of the dissolving color base is water and a water-soluble solvent.
Oil-based inks - Insoluble solvents as the main component of the dissolved chromophore.
The above concepts intersect with each other during actual use. For example, some pigment inks may be aqueous inks or oil inks. However, water-based inks and oil-based inks are absolutely not allowed to be mixed in the same printhead in terms of their nature and the actual requirements of the printer.
The shelf life of the ink is generally two years. The preservation of the ink requires sealing and avoids direct sunlight. The temperature should not be too high or too low (normal room temperature can be used).
Three major factors affecting ink quality
1. Solvent purity in water
2. moisturizer
Since the volatile components and moisture in the mouth will volatilize due to the nozzle being idle, the moisture must pass.
3. Defoamer
If there is a lot of air bubbles in the ink cartridge during printing, it may cause interruption of printing or burnout of the print head and damage it.
How to determine the quality of ink
1, the purity of raw materials and salt content
The high-purity raw materials will better restore the saturation of the image and fully express the bright parts of the image. If the salt content is too high, the ink will produce a certain amount of alkali during the high-temperature ink-jet process, resulting in blockage of the ink nozzle orifice.
2, viscosity
The viscosity of the ink is too high, which will interrupt the ink supply in the printing process; the viscosity is too small, and ink flow will occur during the printing process.
Ink is generally classified into 1 to 8 weather resistance, and the higher the number of stages, the longest resistance time. Including anti-ultraviolet, anti-acid rain, anti-humid, anti-aeolian and so on.
Since different inks have different chemical reagents and different solutions, there are certain differences in chemical composition and color system composition. Here are some suggestions for everyone to use.
1, when the indoor and outdoor ink conversion, especially when the outdoor conversion to the indoor, please empty the original ink, and then use the cleaning solution or purified water to clean the pipeline, or the chemical substances in the ink may have a chemical reaction blocking the nozzle.
2. Users of HP, NovaJet and other thermal foaming machines must empty the air when filling the ink. Otherwise, it will cause the head to burn and reduce the life of the head, or it may cause damage to the ink head, or print off the ink. .
3, users of Epson, Mimaki, Mutoh, Roland and other micro-piezoelectric machines, after using the new ink, because the ink head and the ink need to have a merging time, the breakage of the test strip appears normal within a few hours;
If a single or all ink does not come out, or after a long period of use, ink breakage may occur, there may be insufficient (less than two-thirds) or too much (filled) ink in the ink bag, or there may be air in the pipe, scraping There is too much ink in the sheet and waste ink pad; it is best to manually empty the duct air and handle the ink bag, as well as clean the dirty part.
4, the piezoelectric machine is best to print test drawings every day to keep the nozzle wet; long-term shutdown should be turned on once a week to ensure the smooth flow of ink and ink head wet.
Ink plugging rate
Since the ink can only use neutral ink and does not react with any material, the ink must adhere to the coating. The water-based PIGMENT ink prolongs the outdoor weathering time and improves the waterproof performance. It adds UV (anti-UV) ingredients to the ink, and UV The composition and plugging rate can be said to be proportional to each other. Therefore, when the UV component is too high, a plugging phenomenon will occur. Therefore, the waterborne pigment ink must also be covered with an UV protection film to ensure the outdoor weathering time. The UV component in the UV ink must be at a certain level. Proportion, otherwise plugging is inevitable. After the ink has the waterproof property, if there is no protective measure, outdoor weathering is less than eight months, so it is not easy to produce plugging phenomenon, otherwise it must be coated with UV glue. Therefore, the solvent-based ink can only reduce the UV component to reduce the plugging rate, and the weather resistance of the solvent ink will not exceed 2 months.
Resistance performance
Regardless of the type of ink or ink, the difference in the type of solvent is the difference in the use of dyes and pigments. In general, the resistance to dyes is far inferior to that of pigments, and the number of anti-stages of dyes varies from one color to another. Magenta is the worst, Cyan (blue) and Yellow (yellow). ) and Black (black) are far better than Magenta. The weather resistance of the pigments has better performance for each color, and the average number of anti-dwelling grades is six to eight.
In fact, in addition to the color factors, the formula composition of the ink is the key to the ink's resistance to weather, in addition to the use of mild and non-corrosive solvents, heat resistance, UV absorbers, antioxidants, and free radicals Add to enhance the resistance of ink dyes to weathering;
In addition, choosing the protective film on the coating layer material is also one of the important factors influencing the performance of anti-response;
In addition, its resistance to weather will vary depending on the time and length of external environmental resistance, the degree of moisture in the area, the length of sunlight, the location of the image, and the location and climate.
Therefore, the guarantee of the length of anti-waiting time is not absolute. In fact, in terms of professional technology, we can't make the same guarantee by evaluating it from different angles. This is definitely different from the general guarantee of goods.
At the end of the article, let's look at some of the questions frequently asked by users, hoping to give you a better understanding of the effect of ink on print quality.
1. How does viscosity affect printing?
Viscosity is absolutely important for inkjet printing. To obtain the best performance of inkjet printers, the viscosity of the ink must be maintained within a specific range. How high the viscosity is, the ink will block the nozzle. If the ink viscosity is too low, the air will be reversed. Flow back to the nozzle, causing ink leakage. By maintaining the viscosity within the scope of the license, maximum density can be achieved without ink or ink leakage.
2, the relationship between temperature and viscosity?
The increase in the viscosity of the ink is usually due to the fact that the ink jet printer is operated in a cooler environment and becomes thicker when the ink cools. The simple solution is to increase the temperature so that the environment in the studio stays above 20 Celsius. . Lower temperatures also cause ink adhesion on the media to weaken and dots appear.
3, if the viscosity is too high or too low and spray painting relationship?
If the viscosity is too high, you will begin to see the density decrease as the droplets become less. If the ink is indeed too thick, the ink droplets can no longer come out of the nozzle and the right-to-use printing stops.
If the viscosity is too low, the ink will flow out of the printhead and will also cause air to flow back into the ink chamber.
4. What is the relationship between surface tension and printing?
Surface tension is the attraction between liquid surface molecules. For example, if you look at the raindrops on a window, the beginning of the circle is caused by the surface tension. The water molecules are tightly concentrated to form hemispheres. The tension of pure water is very high, about 75 (square centimetres of difficulty). Most of the organic solvents are very low, about 25 dyne square centimeters. This is why oily solvents are even better.
But since water's plane tension is so large, why can we use water-based ink? This is where chemistry starts. Because of the phenomenon of hydrogen bonding in pure water, water molecules are tied together, so the surface tension increases. A chemical element called "wet-based" was added to the aqueous ink. This wet-based molecule has one end that is in contact with water, breaking the hydrogen bond and the other being in contact with the substrate. The wet basis reduces the surface tension of the ink. And dyed wet matrix, another kind of alcohol-like solution, can also reduce the surface tension of aqueous ink.
1, if according to the color base classification, ink can be divided into:
Dye-type inks, which are dye-based inks, are also the inks used by most inkjet printers today.
Pigment ink - ink based on pigments.
2, if the ink is in accordance with the solvent to distinguish, it is divided into:
Water-based inks - The main component of the dissolving color base is water and a water-soluble solvent.
Oil-based inks - Insoluble solvents as the main component of the dissolved chromophore.
The above concepts intersect with each other during actual use. For example, some pigment inks may be aqueous inks or oil inks. However, water-based inks and oil-based inks are absolutely not allowed to be mixed in the same printhead in terms of their nature and the actual requirements of the printer.
The shelf life of the ink is generally two years. The preservation of the ink requires sealing and avoids direct sunlight. The temperature should not be too high or too low (normal room temperature can be used).
Three major factors affecting ink quality
1. Solvent purity in water
2. moisturizer
Since the volatile components and moisture in the mouth will volatilize due to the nozzle being idle, the moisture must pass.
3. Defoamer
If there is a lot of air bubbles in the ink cartridge during printing, it may cause interruption of printing or burnout of the print head and damage it.
How to determine the quality of ink
1, the purity of raw materials and salt content
The high-purity raw materials will better restore the saturation of the image and fully express the bright parts of the image. If the salt content is too high, the ink will produce a certain amount of alkali during the high-temperature ink-jet process, resulting in blockage of the ink nozzle orifice.
2, viscosity
The viscosity of the ink is too high, which will interrupt the ink supply in the printing process; the viscosity is too small, and ink flow will occur during the printing process.
Ink is generally classified into 1 to 8 weather resistance, and the higher the number of stages, the longest resistance time. Including anti-ultraviolet, anti-acid rain, anti-humid, anti-aeolian and so on.
Since different inks have different chemical reagents and different solutions, there are certain differences in chemical composition and color system composition. Here are some suggestions for everyone to use.
1, when the indoor and outdoor ink conversion, especially when the outdoor conversion to the indoor, please empty the original ink, and then use the cleaning solution or purified water to clean the pipeline, or the chemical substances in the ink may have a chemical reaction blocking the nozzle.
2. Users of HP, NovaJet and other thermal foaming machines must empty the air when filling the ink. Otherwise, it will cause the head to burn and reduce the life of the head, or it may cause damage to the ink head, or print off the ink. .
3, users of Epson, Mimaki, Mutoh, Roland and other micro-piezoelectric machines, after using the new ink, because the ink head and the ink need to have a merging time, the breakage of the test strip appears normal within a few hours;
If a single or all ink does not come out, or after a long period of use, ink breakage may occur, there may be insufficient (less than two-thirds) or too much (filled) ink in the ink bag, or there may be air in the pipe, scraping There is too much ink in the sheet and waste ink pad; it is best to manually empty the duct air and handle the ink bag, as well as clean the dirty part.
4, the piezoelectric machine is best to print test drawings every day to keep the nozzle wet; long-term shutdown should be turned on once a week to ensure the smooth flow of ink and ink head wet.
Ink plugging rate
Since the ink can only use neutral ink and does not react with any material, the ink must adhere to the coating. The water-based PIGMENT ink prolongs the outdoor weathering time and improves the waterproof performance. It adds UV (anti-UV) ingredients to the ink, and UV The composition and plugging rate can be said to be proportional to each other. Therefore, when the UV component is too high, a plugging phenomenon will occur. Therefore, the waterborne pigment ink must also be covered with an UV protection film to ensure the outdoor weathering time. The UV component in the UV ink must be at a certain level. Proportion, otherwise plugging is inevitable. After the ink has the waterproof property, if there is no protective measure, outdoor weathering is less than eight months, so it is not easy to produce plugging phenomenon, otherwise it must be coated with UV glue. Therefore, the solvent-based ink can only reduce the UV component to reduce the plugging rate, and the weather resistance of the solvent ink will not exceed 2 months.
Resistance performance
Regardless of the type of ink or ink, the difference in the type of solvent is the difference in the use of dyes and pigments. In general, the resistance to dyes is far inferior to that of pigments, and the number of anti-stages of dyes varies from one color to another. Magenta is the worst, Cyan (blue) and Yellow (yellow). ) and Black (black) are far better than Magenta. The weather resistance of the pigments has better performance for each color, and the average number of anti-dwelling grades is six to eight.
In fact, in addition to the color factors, the formula composition of the ink is the key to the ink's resistance to weather, in addition to the use of mild and non-corrosive solvents, heat resistance, UV absorbers, antioxidants, and free radicals Add to enhance the resistance of ink dyes to weathering;
In addition, choosing the protective film on the coating layer material is also one of the important factors influencing the performance of anti-response;
In addition, its resistance to weather will vary depending on the time and length of external environmental resistance, the degree of moisture in the area, the length of sunlight, the location of the image, and the location and climate.
Therefore, the guarantee of the length of anti-waiting time is not absolute. In fact, in terms of professional technology, we can't make the same guarantee by evaluating it from different angles. This is definitely different from the general guarantee of goods.
At the end of the article, let's look at some of the questions frequently asked by users, hoping to give you a better understanding of the effect of ink on print quality.
1. How does viscosity affect printing?
Viscosity is absolutely important for inkjet printing. To obtain the best performance of inkjet printers, the viscosity of the ink must be maintained within a specific range. How high the viscosity is, the ink will block the nozzle. If the ink viscosity is too low, the air will be reversed. Flow back to the nozzle, causing ink leakage. By maintaining the viscosity within the scope of the license, maximum density can be achieved without ink or ink leakage.
2, the relationship between temperature and viscosity?
The increase in the viscosity of the ink is usually due to the fact that the ink jet printer is operated in a cooler environment and becomes thicker when the ink cools. The simple solution is to increase the temperature so that the environment in the studio stays above 20 Celsius. . Lower temperatures also cause ink adhesion on the media to weaken and dots appear.
3, if the viscosity is too high or too low and spray painting relationship?
If the viscosity is too high, you will begin to see the density decrease as the droplets become less. If the ink is indeed too thick, the ink droplets can no longer come out of the nozzle and the right-to-use printing stops.
If the viscosity is too low, the ink will flow out of the printhead and will also cause air to flow back into the ink chamber.
4. What is the relationship between surface tension and printing?
Surface tension is the attraction between liquid surface molecules. For example, if you look at the raindrops on a window, the beginning of the circle is caused by the surface tension. The water molecules are tightly concentrated to form hemispheres. The tension of pure water is very high, about 75 (square centimetres of difficulty). Most of the organic solvents are very low, about 25 dyne square centimeters. This is why oily solvents are even better.
But since water's plane tension is so large, why can we use water-based ink? This is where chemistry starts. Because of the phenomenon of hydrogen bonding in pure water, water molecules are tied together, so the surface tension increases. A chemical element called "wet-based" was added to the aqueous ink. This wet-based molecule has one end that is in contact with water, breaking the hydrogen bond and the other being in contact with the substrate. The wet basis reduces the surface tension of the ink. And dyed wet matrix, another kind of alcohol-like solution, can also reduce the surface tension of aqueous ink.
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