PE plastic bag manufacturers analyze the relationship between printing quality and ink concentration
PE plastic bag manufacturers analyze the relationship between printing quality and ink concentration
PE plastic bag manufacturers printing knowledge sharing
The so-called ink concentration is also the coloring power of the ink, which is a common name for reflecting the degree of ink dispersion and the amount of pigment in the ink. That is to say, the higher the degree of dispersion of the pigment, the higher the concentration of the ink; the higher the pigment content in the ink, the greater its concentration. In addition to the pigment determines the concentration of the ink, the binder, filler and additives, to a certain extent, also affect the concentration of the ink. The production process shows that the ink concentration is one of the important indicators affecting the printing quality. Therefore, correctly understanding and understanding several factors related to the ink concentration is of great significance for the production process control of the printing process and the improvement of the printing quality of the product. .
The ink is a hydrophobic colloid which is a homogeneous mixture of pigments, binders, fillers and auxiliaries. The pigment is a coloring matter and plays a role in color development in the ink. It is a colored substance which is insoluble in water and insoluble in the binder but can be uniformly dispersed in the binder, and is a powdery solid. The amount of pigment in the ink determines the durability and concentration of the ink and also affects the drying performance of the ink. Pigment, as the main material of color development, plays a decisive role in the quality and suitability of the ink. Therefore, for printing, only the pigment particles are fine, the oil absorption is large, the specific gravity is small, the hiding power is small, the coloring power is strong, the stability is good, the color is less, the color is bright, and the heat resistance, light resistance, acid and alkali resistance, etc. are provided. Good performance, the ink color of the printed product can get better quality effect. According to the properties and chemical composition of the pigment, the pigment is classified into two types: an inorganic pigment and an organic pigment. Inorganic pigments include various metal oxides, chromates, carbonates, sulfates, and sulfides, such as aluminum powder, copper powder, carbon black, zinc white, and titanium white, all of which belong to the category of inorganic pigments. Inorganic pigments have good light and heat resistance, and have large specific gravity and strong hiding power, but are not suitable for multi-color and high-speed printing requirements. Commonly used organic pigments include chromogenic pigments and lake pigments. The chromogenic pigments are mainly phthalocyanine pigments, nitroso pigments, azo pigments and reducing pigments. The lake pigments are: basic dye lakes, azo lake pigments and acid dye lakes. Most organic pigments have good tinting strength, small particle size, light specific gravity, soft texture, bright color and high concentration. They are the main raw materials for color inks. The binder is also a main component in the ink. It is a raw material that makes the ink a fluid. It has a certain viscosity. It is used to mix and bond solid particles such as powdery pigments, and to transfer and adhere the pigments. On the printed product, the printed product has a certain gloss at the same time. Its color, tension, viscosity, water resistance, dryness, etc. are important factors affecting the performance of the ink, and its amount is also an important condition for changing the fluidity and concentration of the ink. The filler is a fine, white powdery solid material, so it can be uniformly and well dispersed in the binder. Potassium sulphate, magnesium carbonate, calcium carbonate and aluminum hydroxide are all fillers which act to adjust the ink's inkiness, consistency and concentration in the ink. After the pigment, the binder and the filler are processed into a finished ink by a certain amount of the ink, the thick, dark and dry of the original ink may not be able to adapt to various conditions due to different printing conditions. It is generally adjusted by using some additives, such as anti-adhesives, debonding agents, dry oils, bright varnishes and varnishes. These additives will also change the ink concentration after being added to the ink.
The concentration of the ink is large and its consistency is also large. Therefore, the size of the ink determines the depth of the hue of the ink. When the ink concentration is large, the printing hue is deep; on the contrary, the printing hue is shallow. The ink with a large concentration consumes a relatively small amount of ink in printing, and the color of the ink is also good. Conversely, the ink having a small density uses a relatively large amount of ink during printing, and the ink color is relatively light. The concentration of the ink is particularly prominent when printing large-area plate products. It can be seen that the ink concentration directly affects the printing quality of the product. Therefore, when printing fine mesh or thin-line products, it is generally necessary to use a large concentration of ink to print, while the printed solid layout is suitable for a slightly lower concentration. The ink is printed. Since the ink has a "thixotropy" side, when the printing environment temperature is high, the machine speed is fast, the ink is heated and thinned, and the concentration thereof is lowered, which requires printing with a slightly higher concentration ink, which can better ensure the color of the product. quality. Conversely, ink with a slightly lower concentration can be used for printing. If the ink with a small concentration is used to print the background color or the color palette, it is necessary to increase the amount of ink on the layout to obtain the desired printing hue, but this can easily lead to product defects. Based on this situation, the ink used in the color printing product generally adopts a proper adjustment of the hue of the color, and the concentration is also appropriately adjusted, the printing effect is good, and the anti-sticking of the printed product is facilitated. In addition, printing a large area of ​​the solid version, line version or screen version, the printing speed should be adjusted a little slower, in order to reduce the friction coefficient and heat during the printing process, to prevent the temperature from rising too fast, so that the ink is easy to thin flow The increase in sex causes a decrease in concentration, and the disadvantages of lighter printing ink appear.
The process practice and analysis show that the concentration of the original ink is constant when it is not used, but the concentration changes with the variation of consistency and fluidity during use. Changes in printing speed, temperature, and amount of dampening solution can affect the ink concentration. If the moisture in the printing process is too large, the ink concentration will be diluted, and the ink color will appear pale. It can be seen that the ink concentration is a variability factor that affects the quality of the ink color of the product. Therefore, it is of great guiding significance to correctly understand and recognize certain conditions related to the ink concentration and adopt corresponding technological measures for printing.
Information Sources:
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
PE plastic bag manufacturers analyze the relationship between printing quality and ink concentration
PE plastic bag manufacturers printing knowledge sharing
The so-called ink concentration is also the coloring power of the ink, which is a common name for reflecting the degree of ink dispersion and the amount of pigment in the ink. That is to say, the higher the degree of dispersion of the pigment, the higher the concentration of the ink; the higher the pigment content in the ink, the greater its concentration. In addition to the pigment determines the concentration of the ink, the binder, filler and additives, to a certain extent, also affect the concentration of the ink. The production process shows that the ink concentration is one of the important indicators affecting the printing quality. Therefore, correctly understanding and understanding several factors related to the ink concentration is of great significance for the production process control of the printing process and the improvement of the printing quality of the product. .
The ink is a hydrophobic colloid which is a homogeneous mixture of pigments, binders, fillers and auxiliaries. The pigment is a coloring matter and plays a role in color development in the ink. It is a colored substance which is insoluble in water and insoluble in the binder but can be uniformly dispersed in the binder, and is a powdery solid. The amount of pigment in the ink determines the durability and concentration of the ink and also affects the drying performance of the ink. Pigment, as the main material of color development, plays a decisive role in the quality and suitability of the ink. Therefore, for printing, only the pigment particles are fine, the oil absorption is large, the specific gravity is small, the hiding power is small, the coloring power is strong, the stability is good, the color is less, the color is bright, and the heat resistance, light resistance, acid and alkali resistance, etc. are provided. Good performance, the ink color of the printed product can get better quality effect. According to the properties and chemical composition of the pigment, the pigment is classified into two types: an inorganic pigment and an organic pigment. Inorganic pigments include various metal oxides, chromates, carbonates, sulfates, and sulfides, such as aluminum powder, copper powder, carbon black, zinc white, and titanium white, all of which belong to the category of inorganic pigments. Inorganic pigments have good light and heat resistance, and have large specific gravity and strong hiding power, but are not suitable for multi-color and high-speed printing requirements. Commonly used organic pigments include chromogenic pigments and lake pigments. The chromogenic pigments are mainly phthalocyanine pigments, nitroso pigments, azo pigments and reducing pigments. The lake pigments are: basic dye lakes, azo lake pigments and acid dye lakes. Most organic pigments have good tinting strength, small particle size, light specific gravity, soft texture, bright color and high concentration. They are the main raw materials for color inks. The binder is also a main component in the ink. It is a raw material that makes the ink a fluid. It has a certain viscosity. It is used to mix and bond solid particles such as powdery pigments, and to transfer and adhere the pigments. On the printed product, the printed product has a certain gloss at the same time. Its color, tension, viscosity, water resistance, dryness, etc. are important factors affecting the performance of the ink, and its amount is also an important condition for changing the fluidity and concentration of the ink. The filler is a fine, white powdery solid material, so it can be uniformly and well dispersed in the binder. Potassium sulphate, magnesium carbonate, calcium carbonate and aluminum hydroxide are all fillers which act to adjust the ink's inkiness, consistency and concentration in the ink. After the pigment, the binder and the filler are processed into a finished ink by a certain amount of the ink, the thick, dark and dry of the original ink may not be able to adapt to various conditions due to different printing conditions. It is generally adjusted by using some additives, such as anti-adhesives, debonding agents, dry oils, bright varnishes and varnishes. These additives will also change the ink concentration after being added to the ink.
The concentration of the ink is large and its consistency is also large. Therefore, the size of the ink determines the depth of the hue of the ink. When the ink concentration is large, the printing hue is deep; on the contrary, the printing hue is shallow. The ink with a large concentration consumes a relatively small amount of ink in printing, and the color of the ink is also good. Conversely, the ink having a small density uses a relatively large amount of ink during printing, and the ink color is relatively light. The concentration of the ink is particularly prominent when printing large-area plate products. It can be seen that the ink concentration directly affects the printing quality of the product. Therefore, when printing fine mesh or thin-line products, it is generally necessary to use a large concentration of ink to print, while the printed solid layout is suitable for a slightly lower concentration. The ink is printed. Since the ink has a "thixotropy" side, when the printing environment temperature is high, the machine speed is fast, the ink is heated and thinned, and the concentration thereof is lowered, which requires printing with a slightly higher concentration ink, which can better ensure the color of the product. quality. Conversely, ink with a slightly lower concentration can be used for printing. If the ink with a small concentration is used to print the background color or the color palette, it is necessary to increase the amount of ink on the layout to obtain the desired printing hue, but this can easily lead to product defects. Based on this situation, the ink used in the color printing product generally adopts a proper adjustment of the hue of the color, and the concentration is also appropriately adjusted, the printing effect is good, and the anti-sticking of the printed product is facilitated. In addition, printing a large area of ​​the solid version, line version or screen version, the printing speed should be adjusted a little slower, in order to reduce the friction coefficient and heat during the printing process, to prevent the temperature from rising too fast, so that the ink is easy to thin flow The increase in sex causes a decrease in concentration, and the disadvantages of lighter printing ink appear.
The process practice and analysis show that the concentration of the original ink is constant when it is not used, but the concentration changes with the variation of consistency and fluidity during use. Changes in printing speed, temperature, and amount of dampening solution can affect the ink concentration. If the moisture in the printing process is too large, the ink concentration will be diluted, and the ink color will appear pale. It can be seen that the ink concentration is a variability factor that affects the quality of the ink color of the product. Therefore, it is of great guiding significance to correctly understand and recognize certain conditions related to the ink concentration and adopt corresponding technological measures for printing.
Information Sources:
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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