General surfaces such as the face of a toy, an arc-shaped projection such as a calculator keyboard, an arc-shaped depression such as a dish or a plate, other round shapes such as a golf ball, and the like, the best printing is a printing method. However, most printing plates used in the past were copper plates or steel plates. There are many variables in its platemaking process, and quality control is not easy. Platemaking potions are toxic and affect the ecological environment. The steel plate's molecular particles are very rough and cannot represent the detailed part of the image.

The resin gravure plate making is easy, the plate washing uses the general water, the resolving power is as high as the network point more than 300 lines, the special resin composition can easily transfer the ink in the groove, the hard resin surface can resist scratching reaches tens of thousands of brushes.

Resin gravure platemaking process

Cutting board

The size of the cut must be 2 to 4 cm larger than the required size to protect the edge area of ​​the image.

Punching

After punching, punch holes according to the required number of holes.

Main exposure

The purpose of the exposure is to harden the resin layer without images and lines due to exposure.

Wash plate

The part of the plate that has not been exposed to light will be dissolved and washed away during the process of washing; the depressed part of the plate will be the image and lines on the plate.

Bake

The wash solution that penetrates into the imprint during the process of washing will be evaporated in the baking process to restore the sufficient hardness of the plate.

After exposure

No need to use film. The post-exposure treatment can increase the hardness and anti-friction force of the plate.

Plate-making process At present, the production of the printing plate is mainly performed by using a nitric acid solution and a ferric chloride solution added with a protective agent. The acid odor of this kind of corrosion is very unpleasant. The formation of nitric oxide and nitrogen dioxide is very harmful to the human body. The development of the steel plate after corrosion is mostly using hydrogen peroxide as the main chemical solvent, and it also has a certain amount of human skin. damage. So in European countries it has been banned for a long time. They started using resin plates or laser engraving to make plates. Corrosion-resistant steel plates should be regarded as a relatively novel idea to be used for corrosion-free zinc plate corrosion-free machines. Some manufacturers have already succeeded in trial production. This method greatly reduces environmental pollution. The resin plate is much more environmentally friendly and safer. The resin version uses a nylon emulsion that can be developed with alcohol. With the popularity of digitization, the time for digitally printing a resin printing plate will not be long.

A new printing platemaking method

At present, the printing plate type is mainly divided into two major categories: metal plate and resin plate. The metal plate is similar to the gravure plate. The metal plate is corroded by metal and the metal plate is metal plate. The metal plate is etched by the acidic solution to form a concave portion. Acupuncture points, this method will produce harmful gases and waste liquids, causing serious pollution to the environment, there is a trend of being eliminated, but due to its low cost, easy to grasp the operation process, it is still widely used by printing manufacturers; metal engraving is passed The computer controls the engraving knife or the laser to directly etch or burn the graphic part on the metal plate. The effect is very good and there is no harmful substance emission. It is an environmental protection process, but the cost is higher. It is difficult to accept. The common feature of the metal plate is that the printing rate is high and large orders can be completed.

The resin plate is precoated with a nylon photosensitive resist on a metal plate, and the non-graphic part is cured by exposure, and then the unexposed photosensitive adhesive of the graphic part is washed out with water and alcohol to make a gravure plate. The nylon photosensitive adhesive not only has wear resistance, but also Can withstand the scraper repeated friction, in addition it can also reproduce the fine dot, print a beautiful pattern, compared with the metal plate, the print rate is lower, the higher the accuracy of the printing machine, in Domestic use is not much.

According to the characteristics of the metal engraving plate and the resin plate, we should try our best to avoid weaknesses and try to explore a new printing platemaking method and discuss it with interested friends.

The practice is: using engraving machines to pre-engrave on the metal plate with a certain number of lines in the same size, the depth of the same network of holes, the first use of nylon sensitized plastic blocking the full version of the network point, and then scraped with a squeegee, Wait until it is dry before painting and then scrape it several times, so that the dried photoresist is flush with the net wall, and then the negative film is released. The non-graphic part of the photosensitive adhesive still remains in the cell after curing. It can prevent the ink from entering during printing. The part of the photosensitive adhesive can be washed out and the net point can be cleared. When printing, the ink can enter, and the net wall between the net points can be cured. The photosensitive resist can protect the printing ink and greatly increase the printing rate of the printing plate. When an order is completed, the cured photosensitive adhesive can be removed and reused. This way, only a small amount of photosensitive adhesive is consumed for each plate making process. Diluting the cost of plate making and ensuring the quality of printing is really a best of both worlds. Of course, the emergence of any new kind of thing will be accompanied by new problems. Human beings are making progress in discovering and solving problems.

Product recommendation Yufeng printing plate

Sanming City Yufeng Machinery Co., Ltd. G3B brand products are used for printing machine on the steel plate, product quality and reasonable price. The company's existing large-scale production of steel plate, complete product specifications, good flatness, high finish. Products are sold throughout the country and exported to the southeast coastal countries and regions.

Brand: G3B Specifications: Inches

3×4 4×4 4×8 (can be used for oil rake)

8×8 4×10 (can be used for oil rake)

* It can also produce various specifications of printing plates for customers.