The hottest water-based gravure ink

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Water based intaglio ink

water based intaglio ink is a new type of ink with low toxicity or actual non-toxic, non irritating, non combustible and non explosive, which is most suitable for intaglio printing of food packaging. However, the general water-based gravure printing ink has the disadvantages of no brightness, volatilization and low concentration. If you use inner printing ink, the printing effect may be clear, complete, chromogenic and hierarchical

water based gravure printing ink has the following characteristics:

① it is non irritating, non flammable and explosive, meets the requirements of environmental protection, can protect the health of workers to a certain extent, and is conducive to safe production

② the printing effect is good, the text is clear, the dots are complete, and the hair color is strong

③ impervious printing, non-proliferation, non cracking in folding and kneading, slight ash falling

④ it can meet the requirements of rapid printing, create conditions for the development of gravure printing technology, and represent the development direction of gravure printing ink

water based gravure inks are composed of water-soluble resins, pigments, various additives and water. In the process of formula design, we must explore, test and identify various properties and indicators from formula, process to physical and chemical

in the selection of pigments, tests have proved that salt based lake pigments and soluble azo pigments are not applicable. For example, our tensile testing machine contains phosphate, carboxyl and other groups that react with amines and other ions in alkaline media. Alkali resistant pigments will react and coagulate. Other pigments are applicable. If you can make filter cakes with active agents, you can improve efficiency

in order to prevent foam in use, defoamers such as tributyl phosphate, Dibutyl Phosphate and silicone oil can be added to the formula, with the dosage of about 0.5%. In order to prevent coalescence and mildew during storage and transportation, stabilizers and dispersants can be used, such as light silica gel, sodium hexametaphosphate, etc. Benzoyl and benzoyl sodium potassium can be used for corrosion prevention, and the dosage is 0.5% - 1.1%

according to experience, the viscosity and dryness of the designed water-based gravure ink are best controlled within the following range:

ink viscosity (25 ℃, rotary viscometer) (the following information is about the back door and tail support pressure tester 5) × 10-3pa · s

initial dryness (25 ℃) mm/15s

thorough dryness (25 ℃) ≤ 160s/100 μ M

the drying form of water-based ink cannot be ignored. Due to the large evaporation latent heat of water, the drying speed is slowed down. At the same time, due to the unstable decomposition of ammonium salt when exposed to heat, it is mainly volatile drying and reactive solidification drying. Once the dried ink film is no longer soluble in water

because the ink is water-based, the printing unit is required to cooperate with different papers in printing production, chromatic drying equipment, use and operation, etc. in addition

in the production technology of water-based gravure printing ink, some problems such as ink film properties (gloss and resistance), printing and storage stability (viscosity stability, mildew resistance), and drying speed (material deformation, printability) are still the key points to be solved, which need to be further studied and solved

please note:

1. This formula is a reference formula for the majority of technicians to learn and reference. The coating formula will not bear any loss caused by using this formula for other purposes

2. Different results may be obtained by changing the raw materials. The swing rod is not aligned vertically. Therefore, it is necessary for you to test in person and evaluate the test results to ensure that the formula meets your needs

3. It is forbidden to transfer this formula to a third party without the authorization of the coating formula

source: coating formula

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