Packing box manufacturer tells you four printing techniques

For packaging manufacturers, printing technology is already familiar, but for most people, the details of printing technology do not understand, today by the packaging manufacturer Xiaobian tell you what the four printing technologies are.

Printing refers to the process of transferring ink from plate to paper (or other prints). For many centuries, there have been many different printing technologies. According to the different image carriers, these printing technologies can be divided into four types: relief printing, gravure printing, lithographic printing and screen printing.

1. relief printing

Relief printing means that the graphic part on the plate is higher than that on the non-graphic part, and the ink on the ink roller can only be transferred to the graphic part of the plate, while the non-graphic part has no ink, thus completing the printing of the printed matter. It is the relief printing that has a slight bump on the back of the paper, a neat line or the edge of the shop, and a light ink in the center. A few decades ago, relief printing was the main method of printing. In the mid-20th century, flexographic printing began to be more and more applied to packaging printing. Traditional relief printing uses solid metal plates, while flexographic printing uses flexible, soft rubber or plastic plates.

2. Gravure Printing

Contrary to relief printing, the graphic part of the plate is lower than the non-graphic part, forming a groove. Ink is only covered in the groove. There is no ink on the surface of the plate. Paper is covered on the top of the plate. Printing plate and paper are pressed to print ink on the paper from the recessed part of the plate. Gravure printing products have the advantages of thick ink layer, bright color, high printing resistance, stable printing quality and fast printing speed, so they are widely used in practice.

3. Flat Printing

Printed graphic and non-graphic parts keep the same surface. The graphic and non-graphic parts are covered with a greasy oil film, while the non-graphic parts absorb the appropriate moisture. The graphic and text parts reject the moisture and absorb the oil film. The non-graphic parts absorb the moisture and form an anti-ink effect.

4. Screen Printing

In screen printing, the plate is made up of small sieve holes (e.g. nylon). The non-graphic part of the screen holes is sealed by a coated photosensitive coating. Similar to gravure printing, when printing, ink is first applied on the screen, and then scraped lightly on the screen with a rubber scraper. Through the pressure of the rubber scraper, the ink passes through the screen and transfers to the printing material placed under the screen.