0010010 nbsp; 0010010 nbsp;Water-based varnishCommon faults and troubleshooting methods are as follows:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; First, the gloss is not good, the brightness is not enough

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; cause of failure:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; A. The paper is too coarse and the permeability is too strong;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. Insufficient coating amount, the coating is too thin;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; c, glazing 0010010 nbsp; oil viscosity is too small, solid content is too low;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d. The ink on the surface of the printed matter is not dry;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e. The internal quality of water-based varnish is poor;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Solution:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. Properly increase the viscosity of varnish;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b, increase the amount of coating;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; c. The ink should be fully dried before polishing;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d. The paper is too thick, you can apply a layer of primer first;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e. Replace the water-based varnish with better quality

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Second, poor drying, sticky surface

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; cause of failure:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. The water-based varnish is too thick;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; 0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b, varnish viscosity is too high;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp ;, drying tunnel temperature and hot air are insufficient;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d. The coating pressure is uneven, and the local coating is too thick;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e. The machine speed is too fast, especially when the substrate surface is not absorbent;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Solution:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. To reduce the viscosity of varnish, use 50% ethanol aqueous solution as diluent;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b, reduce the coating amount appropriately;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; c. Adjust the pressure to make the coating even and consistent;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d. Increase the amount of hot air and increase the temperature of the drying tunnel;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e, reduce the speed appropriately;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; f, replace the quick-drying water-based varnish;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; 3. Uneven coating on the surface, with streaks and orange peel

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; cause of failure:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a, varnish viscosity is too high;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. The coating amount of varnish is too large;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; c, inappropriate adjustment of coating pressure;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d. The surface of the coating roller is too rough and not smooth;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e, varnish dries too fast;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; f, poor varnish leveling;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; g. The ink does not dry and repels water-based varnish. 0010010 nbsp;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Solution:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. Adjust the coating pressure to make the coating uniform;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. The coating roller is rough, aging or deformed, and should be reground or remade;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; c. The ink should be fully dried before polishing;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; d, reduce the viscosity of varnish appropriately;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; e, reduce the coating amount appropriately

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; f. Replace the water-based varnish with good leveling.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Fourth, the wear resistance is not good 0010010 nbsp;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; cause of failure:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. The dilution is too large;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. The waterborne varnish itself has poor wear resistance.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Solution:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a, reduce the amount of dilution;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. Choose varnish with good wear resistance.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; V. Discoloration of water-based varnish 0010010 nbsp;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; cause of failure:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. Too little resin (linking material) in the ink, the pigment particles lose their protection and become free

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. Varnish can dissolve the ink layer.

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; Solution:

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; a. Use pigment to be fully wrapped with resin ink;

0010010 nbsp; 0010010 nbsp; 0010010 nbsp; b. Choose an aqueous varnish that does not dissolve ink.