How to choose plastic gravure ink in packaging and printing factory
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The resistance of the ink, that is, the ability of the printed ink film to withstand harsh conditions, including light resistance, heat resistance, grease resistance, chemical resistance, and the like. If it is desired to boil the sterilized packaging printing ink and pigment blank, it is required to have boiling resistance.
In the printing and printing production, the economic packaging printing factory pursues low input and high return, that is, according to the principle of moderate packaging, under the premise of satisfying the above conditions, the ink with lower overall cost (purchasing cost plus use cost, etc.) is selected. Although the packaging and printing factory chose the right ink, there are many problems caused by the ink itself during the use of the ink. Then, the package is printed
What are the higher requirements for inks in the brush factory?
Ink Printing Requirements of Packaging and Printing Factory In order to optimize its operating expenses, improve the stability of production, meet the requirements of customers, and improve the production efficiency, improve the production environment and satisfy customers. The environmental requirements of the product are the basic requirements of the packaging and printing plant for the ink. Reducing the cost of use, reducing costs, and maximizing profits are prerequisites for the survival and development of enterprises, and packaging and printing plants are no exception. Although ink only accounts for 15% of printing costs (paper accounts for 45%), we understand that printing companies have not given up efforts to reduce ink costs. Packaging printers hope that ink suppliers will provide the best price/performance ratio. Ink products.曰Improving ink coloring The printing mills are hoping that ink manufacturers will increase the coloration of inks. It is hoped that more jobs will be printed with a certain amount of ink or a minimum amount of ink will be used to reduce the printing cost. However, the amount of ink used is closely related to the colorability of the ink.
In the case where the amount of ink is constant, the higher the ink colorability, the more the printed parts are, and the greater the profit.曰Reducing the use of auxiliaries or using auxiliary auxiliaries On the one hand, the printing mills hope that the inks used can be used directly during printing. There is no need to add or rarely add domestic plastic gravure ink market to analyze the current domestic plastic flexible packaging industry. Large-scale enterprises account for only about 10%, while small and medium-sized enterprises account for more than 90%.
The printing presses of large plastic bag enterprises are advanced, and the printing speed is fast (high-speed printing machine); the product grade is high, the batch size is large, the variety is specific, the ink quality is high and the dosage is large, generally it is fixed at most two to three ink manufacturers. Ink. However, many small and medium-sized plastic packaging companies have been updated in recent years, but medium and low-speed printing machines still account for the majority. The equipment and conditions are poor, and the varieties produced are small, the batch size is small, and the quantity is small. Therefore, inks are more complicated, and there is no fixed ink manufacturer using inks. Generally, low-priced inks are preferred.
Ink varieties in plastic flexible packaging, food packaging, salt packaging, cosmetic daily necessities packaging, pharmaceutical packaging, paper product packaging, clothing packaging: food packaging is based on composite printing ink, some candy paper with printing ink; cooking The packaging uses high-temperature cooking ink, and the general vacuum packaging uses polyester ink; the dairy product packaging should use water-resistant, acid-resistant and temperature-resistant ink. Pharmaceutical packaging and cosmetic packaging are based on polyester inks.
Some manufacturers of salt packaging use surface printing inks, and some manufacturers use composite printing inks, but more manufacturers use polyester inks. Daily necessities packaging, paper product packaging and clothing packaging use a lot of surface printing inks, but the surface printing white ink should be a special, smooth, scratch-resistant, anti-blocking ink. With the improvement of the packaging market, more and more composite inks are used.
The price of plastic gravure ink At present, the price of plastic ink is divided into high, medium and low. The ink market of Shanghai DlC Ink Company, Jiangmen Toyo Ink Company and Shenzhen Shenri Ink Company are higher. Shanxi Xiongying Ink Company and Zhejiang New Oriental Ink Company have the highest ink prices. The price of ink in Zhejiang Yongzai Chemical Co., Ltd. is relatively low, but there are too many small ink manufacturers producing low-priced inks in China.
General plastic gravure ink market price: how to use alcohol-soluble gravure ink alcohol-soluble gravure printing ink, alcohol-soluble synthetic resin, solvent and organic pigment after fully grinding and dispersing, has a good fluidity of colloidal liquid, is a volatile Dry type ink has good printing adaptability, fast drying, bright luster and bright colors. Suitable for cellophane and candy wrappers for printed packaged foods. Printing speed is 25-70m/mm.
How to use alcohol-soluble gravure ink: Store at a lower temperature and stir the ink well before use to make it have good flow properties. The sterol-soluble ink should meet the requirements of the machine in terms of viscosity, thickness, and dryness. If the ink is too thick, dilute with ethanol (can accelerate drying) or butanol (can slow drying), or dilute with thinner. If the speed of the printer is high or the winter climate is slow and dry, a quick-drying agent can be added to accelerate the drying. The inks can be mixed with each other to adjust various colors. However, it should not be mixed with other types of inks to avoid the use of resin precipitation.