1. The impact of the printing press exhaust system on drying
If the exhaust system is not smooth, the volatilized solvent cannot be eliminated in time. Too high a solvent concentration in the oven will hinder the further evaporation of the solvent, thus affecting the drying effect of the printed matter.
2. The effect of ink on drying
(1) The drying effect of water-based ink is closely related to the pH of the ink. Under the same conditions, when the pH value is too low, the drying speed of the ink is accelerated; when the pH value is too high, the ink drying speed is slow, and the phenomenon of smudging on the back of the printed product is easy to occur.
(2) The volatilization speed of the mixed solvent in the solvent-based ink directly determines the drying performance of the ink, and the volatilization rates of different components in the mixed solvent are different. By mixing solvents of different types and different ratios, the solvent evaporation rate of the ink can be easily adjusted, thereby improving the drying performance.
3. The effect of printing speed on drying
Different printing speeds have different requirements on the performance of the drying system. In the case of relatively high speed requirements, there are relatively high requirements on the heating distance and drying efficiency of the drying oven. If the supporting drying system cannot fully evaporate the solvent, it is easy to cause the residual solvent to exceed the standard.
4. The effect of printing plate on drying
For gravure printing, the depth of the printing plate mesh has a great influence on the drying speed. For example, the mesh with a depth of 33 μm and the mesh with 18 μm. The drying time of the former is more than double that of the latter.
5. Influence of environmental conditions
Generally printing in a temperature environment below 20 ℃, the natural drying of the ink should be weakened. When printing in an environment above 30 ° C, the natural drying properties of the ink tend to accelerate.
The effect of high air humidity on drying: First, the moisture in the air enters the ink, causing the overall volatility of the solvent to deteriorate; Second, the large amount of moisture in the air will inhibit the evaporation of the solvent.
Beach Racket,Racquet Beach Tennis,Wooden Beach Tennis Rackets,Professional Beach Tennis Rackets
Ningbo Sno Stationery & Sports Articles Co., Ltd. , https://www.snoflyingdisc.com