The concave convex embossing process of Shenzhen Buke Printing Company

The concave convex embossing process of Shenzhen Buke Printing Company

Concave convex printing, also known as embossing or embossed printing, is a printing method that does not require printing ink or rollers. It uses a set of concave and convex templates corresponding to the yin and yang of graphics and text, placing the substrate in between. By applying a certain pressure, the substrate of the printed product undergoes plastic deformation, thereby artistically processing the surface of the printed product to obtain embossed concave convex graphics and text

Characteristics and functions of concave convex embossing

Concave convex embossing does not use ink. It is a process of creating concave convex templates based on the shape and light and dark levels of objects on the printed image. The color image is pressed into a three-dimensional shape with relief effect, which is rich in layers, clear in graphics and text, strong in three dimensionality, and lifelike in image. It can play a finishing touch on packaging products. Concave convex embossing technology is mainly used for post-processing of paper products and paper containers. The thickness of paper and its products is about 0.3-1mm. Using concave convex embossing technology, Shenzhen Buche Printing Company uses the artistic expression method of combining depth and thickness to make their appearance more perfectly reflected in art.

The process of concave convex embossing

The concave convex embossing process includes the production of printing plates, concave convex embossing, sorting and packaging, and other operations

(1) Production of concave convex embossed printing plates. The printing plate used for embossing is composed of intaglio (negative plate) and relief (positive plate or pad plate). The concave convex plate should be used as a set and requires good matching accuracy between the two plates. The intaglio is not only the intaglio used in embossing, but also the mother mold for making relief plates. When working with gravure, it is necessary to withstand significant pressure, and the materials used for gravure must have sufficient strength and rigidity. Generally, zinc plates, copper plates, and steel plates are used as plate materials with a thickness of 1.5. 3.0mm. The concave and convex parts of the text and text processed on the intaglio are opposite in direction to the processed product. The depth of graphics and text on the printing plate is generally controlled at around 50% of the plate thickness. Common relief plate substrates include polymer materials, gypsum, and paper

(2) Concave convex embossing. After the embossing plate is made, the first step is to install the plate. When installing the plate, it is necessary to complete processes such as sticking the plate, positioning, checking the plate height, and adjusting the embossing force. When positioning, try to place the concave convex plate in the middle of the plate frame as much as possible. The force during embossing will be relatively uniform. When adjusting the pressure, Shenzhen Buche Printing Company should make the protruding parts in the same plane, observe the printing pressure of the concave convex pressing at any time, and then start the machine for trial printing, position the printed product, and officially press it. The second section of container forming, such as container forming processing, refers to the process of processing printed materials into containers, including die-cutting and indentation processing, plastic bag composite bag making and heat sealing, cardboard box pasting, canning and other processes

Die cutting and indentation

The process of using a steel knife and steel wire to form a template, applying a certain pressure through an embossing plate, and rolling the printed product (or paper) into the required shape is called die-cutting and indentation. The molding process of Shenzhen Buchu Printing Company consists of two processes: die-cutting and indentation. Die cutting technology is a process of using steel blades to form molds or steel plates or cylinders to carve molds according to the design requirements of the product. Through pressure, printed materials or other plate-shaped blanks are rolled into the desired shape and certain specifications on a die cutting machine. Indentation technology is the use of a wire press knife (steel wire) or wire press mold to press out line marks on the board through pressure, or the use of a rolling wheel to roll line marks on the board, so that the board can be bent and formed in the predetermined position (paper box, cardboard box). Compression molding technology is mainly used for die-cutting and creasing various types of cardboard, and can also be used for die-cutting and creasing materials such as leather and plastic.

The concave convex embossing process of Shenzhen Buke Printing Company