(Summary description)1. PH stabilizer. The pH stabilizer can supplement the ammonia and water volatilized from the ink transfer system during the printing process, help stabilize the ink viscosity and ensure the printing quality. According to 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 the 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. To 2. Defoamer. Generally, an appropriate amount of defoamer is added to the ink before printing to prevent the ink from foaming, and an appropriate amount of defoamer can be added when necessary during the printing process. The amount of defoamer does not exceed 0.5% to 1% of the total ink volume each time. To 3. Quick-drying and slow-drying agent. Quick-drying and slow-drying agents can be added to the ink according to the actual printing speed of the printer, and the drying speed of the water-based ink can be appropriately changed to obtain a more satisfactory printing effect. Its dosage is 1%-2% of the total ink volume. To 4. Withdrawal of lightening agent. Under the premise that the pH value and viscosity remain unchanged, adding a lightening agent can reduce the color density of a certain ink. The dosage should be determined according to the specific circumstances. To 5. Thinner. Adding diluent to the ink can reduce the viscosity of the thickened water-based ink without affecting the pH value. The amount must not exceed 5% of the total ink volume. To 6. Enhancer. The enhancer can enhance the adhesion of printing ink or gloss oil to the printing material, and its dosage is generally 1%-2% of the total ink volume. To 7. In addition to static electricity. 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.