The length of the transfer distance between the various colors of the printing press affects the printing speed of the gravure printing machine
Because of the color on the printed product when printing, if the ink of the previous color is not dried, the ink of the latter color will dissolve the pre-colored ink, causing coloring. Therefore, the longer the transfer distance between the inks of the gravure printing machine, the longer the natural drying time, the higher the printing speed can be, and the more difficult it is to increase the printing speed.
The effect of the drying box will also affect the printing speed of the gravure printing machine.
The effect of the drying box is good, and the ink is completely dry, not only the front color ink does not dissolve, but also the solvent residue is reduced. Gravure inks are blown dry by hot air rather than hot baked.
First, the gravure ink will prematurely conjunct film when it is heated, and the coating of the color film will affect the volatilization of the solvent in the ink, which will form a phenomenon of ink drying. Secondly, the ink contains a plurality of solvents having different boiling points. Therefore, the volatilization speed of the various solvents is different, that is, the solvent having a low boiling point volatilizes at a high speed, and the solvent having a high boiling point volatilizes at a slow rate. The higher the temperature, the faster the low boiling solvent evaporates and the higher the high boiling solvent remains.