How does a UV printer print a clearly image on glass?

Published by July 05,2021

In the field of advertising decoration, glass is a material that is used the most widely and has four main characteristics: fragile, smooth, lightback, and heavy.

After the screen printing process is slowly eliminated due to environmental reasons, how to print directly on the glass?

For glass sliding doors, glass table tops, glass curtain walls, window glass and other small print jobs, UV-cured wide format inkjet printers are already available.

However, for long-time printing of hundreds or thousands of square meters of industry, in the past can use silk screen, offset printing, pad printing or flexo printing (such as packaging) and other mature processes, now, using UV printing technology has become a reality.

Whether it is a small business or a large number of orders, UV printing glass need conquer at least three important issues for customer service.

1, the choice of ink

Since 2012, various UV inks have been on the market, each with its own advantages and limitations. Therefore, it is important to compare different ink properties and printer options based on the print business.

Many of the special inks printed on the glass are faint, with poor color and saturation. This is a key concern in choosing inks.

2, print adhesion

At present, the general UV printing glass on the market needs to be pre-treated or post-treated.

The pretreatment is mainly done by white baking the surface of the glass. The post-treatment measures are to be baked in a special oven at high temperature for about 20 minutes. Printers with incomplete workflows are not suitable for printing glass.

3, glass weight

The weight of glass is much heavier than that commonly used in UV printing. The weight of ordinary glass is generally 2.5KG/MM/m2.

At the same time, in order to solve the problem of the adhesion of the printed pattern, the glass material is usually selected to be relatively thick, and also needs to be tempered, so it is troublesome to deal with the heavy glass in the printing process.

In combination with the above precautions, the UV printing glass is usually produced by the following steps: first, pretreating the glass surface, then printing the pattern, and finally cleaning and curing the UV varnish.