Stretching is the screen stretched on the mesh bar work, mainly for the screen printing industry and the printing industry. The quality of the screen is directly related to the quality of screen printing, such as overprint accuracy, image clarity, uniformity of ink layer, and the degree of moire of line drawing and image. Therefore, it can be said that stretching is an important part of screen printing.
Stretching, including hand-stretched, motorized stretching and pneumatic stretching and so on. Stretching by hand is one of the simplest traditional methods. Due to the troublesome operation, time-consuming and difficult to guarantee quality, it can only be used with a small amount of printing and less precise requirements. Currently used most of the pneumatic and motorized Stretching, but must be equipped with a dedicated Stretching machinery.
Stretching screen printing plate is an essential step in the production process. Stretching, is the screen under a certain tension firmly fixed in the frame. And to stretch a good screen with a certain tension to meet the sensitizer coating and other platemaking requirements. The size of the mesh tension and the quality of the mesh is directly related to the quality of the screen printing plate, but also has a direct impact on the printing quality. Color printing, the requirements of color sets of screen printing plate per color version of the tension must remain basically the same, so as to ensure overprint accuracy. Only a good network, in order to ensure the platemaking and printing quality. Stretching There are two main methods of manual stretching and mechanical stretching. Stretching by hand is a simple, traditional method. Usually suitable for wooden frame. This method is by artificial nail, wood, adhesives and other materials will be fixed on the wooden frame on the screen. Stretching manual tension can generally meet the requirements, but uneven tension, the operation is more cumbersome, time-consuming, not easy to guarantee the quality of the network. This method is used for a small amount of printing and printing less demanding occasions.
Mechanical Stretching is the use of mechanical power, so that the screen taut, with adhesive mesh firmly bonded together. After the adhesive is dried, the frame is removed and sealed with a one-sided polyester pressure-sensitive adhesive tape. To prevent the adhesive dissolved, and make the screen plate clean appearance. A variety of materials can be used mechanical frame netting. Mechanical Stretch with uniform tension, stretching time is short and so on. Easy to grasp the required tension. Suitable for high-precision plate making.