On May 20, 200 printing zinc sheets were packaged and shipped to customers in Greece.

On May 20, 2021, 200 flat zinc sheets were packaged and shipped to customers in Greece.

How to choose a printing plate?

The printing plate is one of the important raw materials for the production of cartons and cartons. Its characteristics are not only related to the printing production efficiency, but also directly affect the printing quality of the product. Due to the different structural characteristics of the plate material, the printing quality and cost are also different.  How to choose the right plate for printing according to the actual production conditions, product characteristics and plate characteristics of the factory is an important measure to improve the efficiency of carton production and product quality. Therefore, the correct understanding of the characteristics of various printing plates and the scientific and reasonable purchase of carton printing plates are very important links in the purchase control of carton factories.

Types and characteristics of carton printing plates

Carton printing plates are divided into two categories: metal and non-metal. The commonly used processes mainly involve gravure printing, flexo printing (embossing) and flat printing. Due to the different characteristics of the printing plates, their printing effects and production costs are also different. .

Characteristics of gravure plates

The gravure printing plate is made of steel roller material (seamless steel tube or coil) through electroplating, electric engraving and other processing techniques. The gravure printing process equipment investment is high, the plate making process is complicated, the plate making cost is high, and the plate changing operation is also more troublesome. , And there are certain pollution problems. However, gravure products have thick and uniform ink layers, rich layers of printed products, strong texture, and fast drying speed of printed ink colors. In addition, it also has fast printing speed, relatively stable printing ink quality, not easy to produce printing color difference, and the printing plate is resistant. The advantage of higher printing rate, if used for packaging products such as electronics, medicine, food and cigarettes with a particularly large number of printing, it can better reduce production costs.

Features of PS version

The base material of the lithographic PS plate is aluminum, which is brittle and easy to be stretched and deformed and cracked. However, its hydrophilic and lipophilic properties are better, and the dual properties are closer. Because there is a dense oxide film on the surface of aluminum, it has certain chemical stability, and has certain hardness and wear resistance. After processing, its hydrophilicity and lipophilicity will be better improved. PS plate is currently pre-printed. The main printing plate material of the carton, because of its simple and fast plate making process, the plate loading operation is very convenient. It can print solid plates, line plates, and fine anilox plates with good printing reproducibility. The printing price is relatively cheap. It is widely used for printing carton tissues and paper boxes and other packaging products.

Characteristics of rubber plate

Rubber plate is a common plate material for flexographic printing process. Because of its soft material, it is widely used for direct printing on corrugated cardboard. The main materials of the rubber plate are natural rubber and synthetic rubber. There are three ways to make plates: manual engraving, laser engraving and casting. When using a rubber plate, pay attention to its printability. For example, considering the ink affinity, ink transfer, coverage and reproducibility of the rubber, use water-based ink for printing, and use natural rubber plate material than synthetic rubber plate Good material. Butyl rubber plates are more suitable for solvent-based inks. Nitrile rubber plate should avoid using solvent-based ink as much as possible to prevent the printing plate from being damaged by solvent corrosion. The rubber plate can not only print the substrate with rough surface, but also print on the harder material, and has a higher printing durability. However, it has the disadvantage of being easily deformed, so it is not suitable for printing high-precision products.

Characteristics of photosensitive resin plate

Photosensitive resin plate is also called photosensitive resin flexographic plate. Its main advantages are simple plate making process, fast plate loading speed, high printing resistance, good ink transfer performance, and its plate making speed is much faster than manual engraving and casting rubber plate. The quality is relatively stable. Photosensitive resin

There are two types of plates: liquid and solid. Among them, the liquid photosensitive resin plate is formed on a molding device, and the liquid photosensitive resin is formed into a plate according to the required thickness. It has the characteristics of not polluting the environment, low cost, and high production efficiency. It is more suitable for monochromatic prints with text and lines and prints with low quality requirements. The liquid photosensitive resin plate has the disadvantages of easy deformation and poor printing reproduction effect. The solid resin plate is made by pre-coating photosensitive resin on a thin metal plate or polyester sheet by the plate manufacturer to make a plate with uniform thickness. This plate has good latitude and can reproduce finer high-gloss dot levels. Its expansion ratio is much smaller than that of rubber plates and liquid resin plates, so it is more suitable for making screen plates and line plates. However, the price of the solid resin plate is relatively expensive, and the production cost is relatively high. Therefore, it is more suitable for printing bulk packaging products.