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 investment and high return, that is, according to the principle of moderate packaging, under the condition that the above conditions are met, the ink with lower total cost (purchasing cost, use cost, etc.) is selected. . Although the packaging and printing factory has chosen the right ink, there have been many problems arising from the ink itself during the use of the ink. So, what are the higher requirements for inks in packaging and printing houses?
Ink printing requirements of packaging and printing factories In order to optimize their operating costs, improve the stability of production, meet the requirements of customers, and improve the production efficiency, improve the production environment and satisfy customers while producing high quality products. The environmental requirements for products are the basic requirements for inks in packaging and printing plants. Reducing the cost of use and reducing the cost, the maximum profit is the condition for the survival and development of the enterprise, and the packaging and printing factory is no exception. Although ink only accounts for 15% of the printing cost (paper accounts for 45%), but we understand that the printing factory has not given up the effort to reduce the cost of ink, packaging and printing plants are more interested in the ink supplier to provide the best price/performance ratio. Ink products.æ›° Progressive ink coloring printers are hoping to improve the coloration of inks in ink manufacturers. It is hoped to use a certain amount of ink to print more jobs or quantitative jobs with a minimum amount of ink to reduce printing costs. 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.æ›°Reducing the use of auxiliaries or using auxiliary auxiliaries On the one hand, the printing factory hopes 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 on the scale only account for 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, the printing presses of many small and medium-sized plastic packaging enterprises have been updated in recent years; however, medium and low speed printing presses still account for the majority. The equipment and conditions are poor, and the varieties produced are small, the batch size is small, and the number 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 advancement of the packaging market, more and more use of composite printing inks.
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 activity 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: It should be stored at a lower temperature, and the ink should be thoroughly stirred before use to make it have good activity. The sterol-soluble ink should meet the requirements of the machine in terms of viscosity, thickness, and dryness. If the ink is too thick, it can be diluted with ethanol (can accelerate drying) or butanol (can slow drying), or diluted with thinner. If the speed of the printer is high or the weather is dry and slow in winter, a quick-drying agent can be added to accelerate the drying. The inks can be mixed with each other to adjust the brilliance. However, it should not be mixed with other types of inks to avoid the use of resin precipitation.
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