Before flexible packaging printing, first find out the types and usage of water-based ink additives Industry News-
by：Supouches Packaging 2022-11-08
1. PH value stabilizer. The pH stabilizer can supplement the ammonia 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. Defoamer. Generally, an appropriate amount of defoamer is added to the ink before printing to prevent the ink from foaming. When necessary, an appropriate amount of defoamer can be added during the printing process. The amount of defoamer should not exceed 0.5% to 1% of the total ink volume each time. 3, quick-drying, slow-drying agent. According to the actual printing speed of the printing machine, fast-drying and slow-drying agents can be added to the ink, 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. Withdrawal agent. Under the premise of constant pH and viscosity, adding a lightening agent can reduce the color concentration of a certain ink. The dosage should be determined on a case-by-case basis. 5. Thinner. Adding diluents to the ink can reduce the viscosity of thickened water-based inks without affecting the pH. Its amount must never exceed 5% of the total ink volume. 6. Enhancer. The 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 amount. 7, in addition to static agent. The antistatic agent can effectively prevent the accumulation of static electricity on the printing machine, and its dosage is generally 0.5% to 1% of the total ink volume.