UV CURABLE GLOBS EFFECT INK FOR GLASS/METAL

UV-GM-980 is a kind of special effect ink designed for glass/metal. The ink should be used together with UV-GI-981N which is used as a base. The base ink can be clear or colorful, and exhibits good adhesion to glass and excellent water resistance. When the glass is cut and polished, the cured film won’t fall off or become disrupt. The globs are evenly distributed and its size can be controlled.

Produce process:

Clear and dry the glass→Screen print (300-350) the base ink (UV-GI-981N)→IR preheating (50-80℃)→UV curing→Screen print (100-120) the globs effect ink (UV-GI-980N)

→IR preheating (50-80℃)→UV curing→vacuum coating→Back paint’s shower coating

→Baking and drying→End product

Notes:

1、 screen-mesh-count

In order to improve the transparency, it’s advised to use screen (300-350) to print the base ink and using screen (100-120) to print the globs effect ink. The size of globs can be controlled by the count of screen mesh and produce process. When the number of screen mesh is fewer, the coat will be thicker, and then the globs will be bigger.

2、 Additives

It’s necessary to add the 21# waterproof agent (about 2 %) to the base ink before printing, in order to improve adhesion to glass and water resistance. What’s more important is that the ink mixed with 21# should be used as quickly as possible (within two hours), otherwise it may be bad.

3、 IR preheating

    It’s important to preheating the glass which is coated by the base ink before UV curing. Usually, the speed of curing is 4-5m/min to the base ink, and 3-5m/min to the globs effect ink. The size of globs depends on the speed. It will be too small when curing is too slow, and when curing is too fast, the globs may don’t appear.

4、 The power of machine

It’s enough that there are two mercury lamps (80 W/cm). The base ink should not be cured too more, otherwise it’s easy to make the base ink yellowing, disrupt, and influence the adhesion to the globs effect ink.

 5、 Environment of printing

       Avoid direct sunlight.