What are the types of commonly used water-based ink additives and how to use them? Commonly used additives in water-based inks are: PH value stabilizer, defoamer, slow drying agent, fast drying agent, etc. 1. pH value stabilizer As we all know, pH value is very important for the stability of water-based ink performance, so the printing workshop should first have pH value stabilizer. The pH stabilizer can supplement the amine and water volatilized from the ink transfer system during the printing process, which helps to stabilize the ink viscosity and ensure the printing quality. According to the different substrates, pH stabilizers are divided into ordinary type and film type. When printing fine mesh lines, use a special pH stabilizer. The general usage of pH stabilizer is to add 1~2% of the total ink volume every 30~40 minutes and stir evenly, or add the stabilizer to the circulating ink pump. 2. Defoamers Generally, an appropriate amount of defoamer is added to the ink before printing to prevent the ink from foaming. If necessary, an appropriate amount of defoamer can be added during the printing process. The amount of defoamer should not exceed 0, 5~1% of the total ink volume each time. 3. Quick-drying and slow-drying agents can be added to the ink according to the actual printing speed of the printing machine, and the drying speed of the water-based ink can be appropriately changed to obtain a satisfactory printing effect. Its dosage is 1~2% of the total ink volume. 4. Under the premise that the pH value and viscosity remain unchanged, adding the lightening agent can reduce the color concentration of a certain ink. The dosage should be determined on a case-by-case basis. 5. Diluent Adding a diluent to the ink can reduce the viscosity of the thickened water-based ink without affecting the pH value. Its usage must never exceed 5% of the total ink volume. 6. Enhancer Enhancer can enhance the adhesion of printing ink or varnish to the printing material, and its dosage is generally 1~2% of the total ink volume. 7. Antistatic agent Antistatic agent can effectively prevent the accumulation of static electricity on the printing machine, and its dosage is generally 0, 5~1% of the total ink volume. More knowledge of flexible packaging bags can be found on the details page: http://www.yltpacking.com China YLTpacking packaging!
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