TWI638725B - Method for printing transparent on different printing media - Google Patents

Abstract

A method for printing a transparent ink on different printing media, which is a UV light irradiation curing process performed by printing a plurality of transparent inks on a printed product in a single printing process. It is characterized in that after the first printing of the clear ink, a UV light irradiation curing process is performed.

Description

Method for printing transparent ink on different printing media

The invention relates to a method for effectively reducing the influence of the surface tension difference of the coloring or film-protecting material on the transparent ink glazing process, and improving the printing effect on the printing of the transparent ink on different printing media.

Because UV inks have the characteristics of overprintable stack thickness, they are often used in special applications like 3D printing, such as embossing or blind braille. In order to make the printed product show a rich color gradation change, the UV inkjet printer performs multiple printing strokes according to the image size and resolution of the image to be printed when performing color separation processing using the color separation software (multi -pass), so that the inkjet head successively prints the material to be printed and repeatedly inkjets the ink on the printed matter, thereby accumulating the ink dots printed in each printing stroke at the same inkjet position. Renders the effect of multi-level printing.

At the same time, in the printing, through the transparent ink glazing on the printed matter, in addition to increasing the texture, the profit of the finished product after printing can be greatly improved. At present, the glazing materials used in the brush are carbon powder, ink, gold/silver foil, PU film and traditional ink. Different brands also have surface tension differences, and different brands of transparent inks are suitable for printing. The surface tension of the material may also be different. If the two are incompatible, the transparent ink is not easy to level and the ink gathers or spreads, which causes defects in the surface of the printed product. Therefore, the current practice is to adopt the pre-printing advance. After the print test, the compatibility of the ink with the dielectric material on the print is known.

However, the above method still has to pass the repeated printing test to obtain a better balance point. In view of this, how to reduce the above-mentioned surface tension in a printing process has been the research direction of the inventors. .

SUMMARY OF THE INVENTION The main object of the present invention is to provide a method for effectively reducing the influence of the difference in surface tension of a coloring or filming material on a clear ink glazing process to improve the printing effect on a different printing medium.

In order to achieve the above purpose, the present invention provides a method for printing a transparent ink on different printing media, which is to print a plurality of transparent inks on a printed product in a single printing process. The UV light irradiation curing process is further performed once, after the first printing of the clear ink, a UV light irradiation curing process is performed.

In the implementation, the final UV light irradiation curing process is performed after the second to the nth time.

In the implementation, a UV light irradiation curing process is performed after each printing of the clear ink.

In order to further understand the present invention, the specific embodiments of the present invention and the effects achieved thereby are described in detail below with reference to the drawings and drawings.

DETAILED DESCRIPTION OF THE INVENTION The following is a preferred embodiment of a method of printing a clear ink on different print media.

The invention provides a method for printing transparent ink on different printing media, which is to perform UV printing once after printing a plurality of transparent inks on a printed product in a printing process in one printing process. Irradiation curing procedure.

Wherein, after the first printing of the transparent ink is completed, the UV light is turned on after the bottoming process is completed, and a UV light irradiation curing process is performed on the transparent ink after the bottoming, so that the transparent ink after the bottoming is subjected to Immediately after the irradiation, the transparent ink is prevented from being deformed, and after the second to nth times, the final UV light irradiation curing process is performed. Of course, after each printing of the transparent ink, a UV light irradiation curing process can be performed, so that each time the transparent ink is glazed, when the previous transparent oil film is stacked, the previous transparent ink has been cured. .

Therefore, through the above design, after the first printing of the transparent ink or even after printing the transparent ink, the UV light is turned on for the curing process, so that the transparent ink does not have surface tension even after several times of printing and stacking. The problem of gathering or spreading out of the problem is that the quality after printing is quite different from that of the conventional technology.

The above is a specific embodiment of the present invention and the technical means employed, and many variations and modifications can be derived therefrom based on the disclosure or teachings herein. The role of the invention is not to be exceeded in the spirit of the specification and the drawings, and should be considered as within the technical scope of the present invention.

In summary, according to the above disclosure, the present invention can achieve the intended purpose of the invention, and provides a method for printing transparent ink on different printing media, which is of great industrial value, and proposes invention patents according to law. Application.

Claims (3)

A method for printing a transparent ink on different printing media, which is a UV light irradiation curing process performed by printing a plurality of transparent inks on a printed product in a single printing process. It is characterized in that after the first printing of the clear ink, a UV light irradiation curing process is performed. A method of printing a clear ink on different printing media as described in claim 1 wherein the final UV light irradiation curing process is performed after the second to nth times. A method of printing a clear ink on different printing media as described in claim 1 or 2, wherein a UV light irradiation curing process is performed after each printing of the clear ink.