The manufacturers who really understand and fully use water-based printing inks in the printing market are very small. The article describes the application of water-based printing inks. It is hoped that the majority of printing manufacturers will abandon their conservative ideas and accept new types of environmental protection inks, which will bring unexpected benefits to enterprises.
The water-based printing inks produced by some ink manufacturers in China have been used in gravure, flexo, screen, and spray applications. In flexo printing, regardless of printing plastic films or paper, they are the same as solvent-based inks. The printing speed is 70 meters/minute, and the glossiness is above 60Â°C, which is 100%. Special non-woven printing needs low-viscosity ink printing to be effective. The ink viscosity needs to be reduced to 7-9 seconds, so the printing area will increase, so the cost of ink consumption accounts for half of the solvent-based ink cost.
Printed plastic film requires only 40 dynes of surface treatment. It is better to stop the adhesion during printing than solvent inks. Regardless of flexographic or gravure printing, just before printing on the machine, the ink needed for printing on the same day is tap water. Dilution (that is, adjusted to the desired printing viscosity), no need to add thinner for the change of ink viscosity in the printing process, so that the printed matter has different shades of color. Ink only needs to add new ink when the amount of ink in the ink tank is not enough. . From boot to work, the hue of the printed pattern is absolutely the same, which greatly reduces the scrap rate. In gravure printing, as long as the printing plate (electric engraving) made of shallow version (15-25u) enhanced hot air, you can reach the printing speed of solvent-based ink, so that the consumption of ink is only half of solvent-based ink. Most printing plates on the market today use 40u deep printing. The consumption of ink per square meter is 12 grams (full-plate coating), while the printing ink is printed in 20u, and the consumption of ink is only 6 grams per square meter, and the abrasion resistance is far higher than the solvent ink.
Printing companies gravure printing and flexo printing are two kinds of business, only need to purchase a flexographic ink, such as flexographic printing, the use of flexographic ink, the need to use gravure ink added to the ink when gravure printing The emulsion provided by the factory was changed into gravure ink for printing with slight stirring. In this way, the common two kinds of used inks avoid the use of funds and space, and also eliminate potential safety hazards.
Since all inks are produced using tap water, the PH value is between 7 and 8. It is stable, non-toxic, odorless, and will not burn. It does not cause any damage to the human body. Moreover, during use, there is almost no loss, and there will be no anti-sticking phenomenon due to high temperature or pressure of the printed matter due to high temperature or glossiness due to wet weather. It is set to freeze-resistant (minus 20Â°C) and high-temperature (220Â°C). The storage period is 3-4 years without deterioration. After the solvent ink is used, the storage period is only within 1 year. It often appears dull and knotted. Paste and other phenomena. The ink can be stored for more than 2 to 3 years after use, without the appearance of similar solvent-based inks. Water-based inks can be used for printing without any changes to the gravure or flexographic printing presses.
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