Do these points well never worry about the printing quality of water-based inks

With the acceleration of the oil-to-water process in the printing industry in 2019, many printing plants will use water-based inks to print, some unexpected problems will occur. The following is a list of some issues that need to be paid attention to when printing with water-based inks. Do these jobs well , Making you more smooth in the printing process of water-based ink.

1. Pay attention to controlling the parameters of water-based inks, including ink fineness, viscosity, fluidity, pH drying speed, thixotropy plasticity.

2. Since the water-based ink is a pure water-based system, it is necessary to mix the water-based ink with the alcoholic ink the solvent-based ink add organic solvents to the ink to avoid printing quality problems. The water-based ink is very suitable for high-speed When printing, if the drying speed is too fast the printing effect is good during low speed printing, a certain proportion of slow drying agent can be added. .

3. When using water-based ink, stir it evenly, pour it into the ink tank after measuring the appropriate viscosity, if the viscosity is suitable, you can use thinner thickener to adjust, pay attention to control the pH value of the ink, generally in 8.5 ~ 9.5. During the printing process, due to the volatilization of water, the viscosity of the ink will increase the pH value will decrease. Therefore, you should always observe the use of the ink find that when the viscosity of the ink increases the pH exceeds the control range, you should use diluent pH stabilizer in time. Adjust to ensure the stability of viscosity pH.

4. After printing, return the remaining ink to the original bucket for reuse next time. Prevent contact with air to cause conjunctiva on the surface of ink water, volatile thickening even drying. The water-based ink should be sealed stored in a ventilated cool room, the room temperature should be controlled at 5～45℃.

5. The ink remaining on the printing equipment after printing should be cleaned as soon as possible, because the water-based ink can be rinsed with clean water when it is completely dry. It is simple convenient. Once it is attached to the machine after drying, you need to use a cleaning agent.