The main solvents of water-based varnish are water, colorless, tasteless, non-toxic, wide source, low price, almost zero volatility, and good leveling. However, there are also shortcomings, such as slow drying speed, and easy to cause instability of product size. Therefore, when appropriate, ethanol is added to improve the drying performance of waterborne solvents and improve the processing adaptability of water-based varnish.

    The application of water-based varnish must be considered comprehensively according to different glazing methods, paper types and product quality requirements, so as to achieve good results. In use, attention should be paid to:
    (1) during the coating process, the viscosity and solid content of varnish must be reasonably controlled, and dilution can only be carried out within a certain solid content range.

    (2) When choosing the paper type, thick paper must be considered to have good dimensional stability and poor dimensional stability.

    (3) we should pay attention to the amount of water varnish coating is not easy to control, so viscosity control is very important.

    (4) the use of water-based varnish can completely eliminate or reduce the use of anti soiled agents, because the water-based varnish is completely cured, the surface is very smooth, rarely sticky.

    (5) To control drying time, we should make full use of water based varnish. Another way to increase the drying speed is to increase the content of ethanol, but it must be combined with the actual situation and the viscosity of varnish, so that it can not be adjusted at will.