Printing operation quality control

(1) Use of additives

Imitation metal etching ink in the initial printing, do not arbitrarily add other solvents, only when the printing process does not appear in the printing ink leakage, can be properly added a small amount of diluent and then printing. Too much of the diluent or stirring is not enough, it will greatly affect its metal texture, but also affect its firmness and dryness on the aluminum gold film. Therefore, when the ink is compounded, various additional materials must be stirred evenly.

In order to reduce the leveling of the ink on the film surface after printing, no or little dilution or leveling agent is used during compounding to promote the formation of rough and rough film surfaces. Special thinners or industrial alcohols should be used for dilution and cleaning.

(2) The selection of scraper

UV inks cannot use polyurethane-made squeegees. Special rubber squeegees are used.

Scraper: The hardness should not be too high, generally 65 Shore hardness is appropriate.


The shape of the scraper: The substrate is flat, and a right-angle scraper should be used; when the substrate is a convex surface, a conical scraper is used;

The length of the squeegee requires that the squeegee is generally slightly wider than the printed image, so that when the ink is pushed back, there is no residual film on both sides.

The quality of scraper pressure is an important factor that cannot be ignored. Because the ink is short and thick, the pressure is low, the ink passes through the net is not smooth; the pressure is large, the amount of ink passing through the mesh hole will be too much. Both will affect the print quality and imitation metal etching printing effect, scraper pressure should be controlled at a slightly larger than the pressure of ordinary color ink is appropriate.

The pressure should be the same size when printing, to avoid the pressure due to different sizes, resulting in imitation metal etching ink layer thickness varies, affecting the uniformity of uneven rough surface.

(3) In the printing process, the wetting state of the imitation metal etching ink should be maintained to ensure that the effect of the printed matter is completely consistent. The degree of wetting is determined based on the user's experience. When the ink is dry, add special thinner in time, and continue to use it after stirring.

(4) The drying of the imitation metal etching ink should be selected within the UV lamp power of the violet lamp power of 80W ~ 6.4kW according to the thickness of the ink and the speed of the light curing machine. The light curing machine must be equipped with a cooling device to prevent thermal deformation of the composite paper when it passes through the curing machine.