What are the problems of water - based ink printing?
Water-based ink printing eligibility by printing conditions, substrates, surface characteristics, environmental temperature and humidity, storage duration and other objective conditions, the influence of water-based ink printing must be familiar with additives in features and using method.

1. The color is used to deepen the color. The dosage should be controlled at 0 ~ 30%, and over 30% will make the content of the connection material in the water ink too low, resulting in the decrease of adhesion and wear resistance.
2. The pH stabilizer is used to adjust and control the pH value of water-based ink, so as to stabilize it at 8.0 ~ 9.5, guaranteeing the printing status of water-based ink. At the same time, it can adjust the viscosity of water-based ink and dilute the ink.
3, slow drying agent used to reduce the degree of dry ink, slow drying agent can inhibit and slow the drying speed of water-based ink, prevent ink drying on the plate, reduce the blocking version and paste version of printing failures occur. The dosage of slow drying agent should be controlled at 0 ~ 10% of total ink amount. If excessive amount of addition, ink drying is not complete, the printed matter will be sticky or produce peculiar smell.
4. Water-based ink diluent is mainly used to reduce the depth of color. But adding a large amount of diluent may lead to a slight increase in ink viscosity, which can be adjusted by adding a small amount of diluent at the same time.
5. The dilution is mainly used to reduce the viscosity of ink, and the dosage should be controlled within 3%, so that the color depth of the ink will not be reduced, and the pH value of the ink can be kept unchanged. The thinner should be gently stirred to prevent the viscosity too low. If you add a lot of diluent or use a high hardness tap water to dilute the bubble, you should add a defoaming agent.