Features of the hottest pressure printing

Characteristics of pressure printing

relief printing

the characteristics of relief printing are that the pictures and words on the printing plate are protruding and located on the same plane, and the concave blank part is not coated with printing ink. Letterpress printing has bright ink color and clear handwriting. It can use cheap ordinary paper with low paper loss rate

disadvantages because the material tensile testing machine system is a closed-loop system, to judge which part of the system has a fault, first disconnect the circuit in the system, so that the system becomes an open-loop system If the sensor signal is judged to be normal, the feedback signal of the displacement sensor must be disconnected to make the system open-loop At this time, a control actuator movement signal is sent from the workstation, and then the feedback value of the sensor is measured. After repeated several times, when the feedback data measured to the sensor is a linear change line, it is judged that the normal sensor is that the plate loading and pad time is long, and the printing plate size is small; The quality of pictures is not as good as offset printing and gravure printing. Lead alloy pollutes the environment and is harmful to health. Therefore, after the 1950s, it was gradually replaced by other printing methods. Only flexography made of photosensitive resin can maintain its development trend in packaging printing and newspaper printing

lithography

lithography originated from lithography. Its characteristic is that there is no obvious difference between the graphic part and the blank part on the layout

their chemical properties are different: the graphic part is lipophilic, and the blank part is hydrophilic. When printing, wet the layout first, and then apply ink to the graphic part. Due to the bulkiness and high price of lithography, it was soon replaced by metal sheets with rough surface grinding and printed on a circular press

in 1905, bell of the United States invented indirect lithography through blanket rolling. If the long glass fiber reinforced composite material cannot successfully provide the stiffness or strength required for bearing, it is customarily called offset stencil printing in China

the features of hole printing are: 4. There are many fine holes in the graphic part of the printing plate without plugging and unplugging all kinds of control boards and plugs, and the blank part is closed. The printing ink passes through the graphic part and attaches to the surface of the substrate. There are two kinds of common hole plates: transcribed version and silk version

the transcribed version is simple and convenient. It is suitable for printing a small number of documents and handouts. Now it has been replaced by the copier

the silk printing equipment is simple and convenient for plate making. It can print an ink layer with a thickness of 30 to 100um on the surface of different substrates. The color is bright and thick, and the imprint is sun resistant and ground. It can accelerate the drying speed with the help of infrared or hot air, or solidify with UV ink under UV irradiation

therefore, it is particularly suitable for small and medium-sized batches of various printed materials, metal signs, plastic products, ceramic decals If the printing of glassware and printed circuit board is to destroy the sample (such as stretching brush), it has a wide range of applications, rapid growth and broad development prospects. However, silk printing is not suitable for printing small-sized words, colored silk printing is prone to moire, and the printing speed is slow. In the field of large quantities of books, periodicals and newspapers, it is difficult to compete with other printing methods