Brief introduction to the printing characteristics

Transcription printing features and process introduction

transcription printing is divided into worker wax paper engraving and typing wax paper engraving

1. Hand engraved wax paper printing

transcribed printing is commonly known as mimeograph printing. Because of its convenient operation, simple equipment, low printing cost and other reasons, it has spread to almost all aspects of society. Almost all typing rooms and clerical rooms of organs, schools, enterprises and institutions, social organizations and so on use transcription printing. Typewriting and transcribing agencies can also be seen everywhere in the market. Only because of its poor printing quality, it is not elegant, so the competent departments of the printing industry never treat it as a printing industry, but subordinate to the cultural service industry. But from its principle, of course, it should belong to the printing category

although the name of the transcribed version is called version, in fact, it is just a piece of wax paper. Lay the wax paper on the steel plate and use a steel needle pen to write or depict on the wax paper. Because the steel plate is full of raised lines, the wax layer on the wax paper is cut under the action of the tip of the steel needle and the steel plate pattern, exposing the fiber pores of the wax paper itself. Attach the wax paper engraved in the impact test to the contact of the tension vibration upper/lower limit switch, so as to cut off the power supply of the machine and stop the experimental machine on the tight frame, which becomes a wax plate. When printing, put the stencil on the substrate, and use the ink roller to roll back and forth on the stencil. Under the extrusion of the ink roller, the ink passes through the fiber pores in the graphic area of the stencil and is transferred to the substrate, that is, the printing is completed

this printing method is so simple that it can't be simpler. It doesn't need any machines. As long as there are steel needles and pens, steel plates, ink rollers, mimeograph frames, mimeograph inks, and paper, it can be block printed. Although the printing quality is poor, its simple operation and low cost still make it widely popular

2. Typing, engraving and stencil printing

although manual engraving stencil is simple, the font and font are poor in beauty, and the engraving speed is too slow. Since the Chinese typewriter came into being, wax paper engraving by typewriter has gradually replaced manual wax paper engraving. Not only the speed of typing is much faster than that of manual engraving, but also the quality of typing is better than that of manual engraving

the principle of Chinese typewriters is basically the same as that of Western typewriters, but the structure of Chinese and Western typewriters is very different. The reason is that the Western Pinyin characters only have dozens of letters, while the Chinese characters have thousands. In order to make the Chinese typewriter as compact as possible, we have to take great pains in the setting of the typewriter's disc. According to the frequency of use of Chinese characters under normal circumstances, Chinese characters are divided into special-purpose words, common words, intermediate words and standby words, with a total of more than 2400 single words, which are arranged and placed in the disc according to certain rules. The typewriter's words are made of hard metal, which is called steel movable type. The tool for clamping steel movable type is called word hammer. The word hammer and the machine body are placed on a smooth horizontal track and can be moved back and forth, left and right easily, so that the typist can select words on the disc. The typing wax paper roll is installed on the rubber drum of the typewriter. When typing, the typist selects the words on the disc according to the manuscript, and then moves the hammer so that the selected steel movable type is right against the hammer that clamps the steel movable type. The typist pressed the typing button, and the hammer quickly took the steel movable type from the tray, aiming at the typing wax paper on the leather roller. So the handwriting of the steel movable type is printed on the wax paper, breaking the wax layer and exposing the pores of the fiber of the typing paper. After the hammer finishes striking, it will automatically return the steel movable type to the original disc. The lead screw is one of the main parts. The typing rubber roller drives the typing wax paper to automatically step into a grid to complete the typing task of one word. In this way, we can repeat, hit the wax paper, and finally complete the typing task

3. Speed printing machine printing

although manual transcription printing is simple, the printing speed is too slow. The printing speed can be greatly improved by using a hand-operated rapid printing machine. A small motor is further installed on the hand-operated quick printing machine, which not only makes the operation more convenient, but also further improves the printing speed

the yarn sheet of the speed printer is on the drum. Attach the engraved wax paper to the yarn drum. After fixing the position, start the speed printer. The yarn drum drives the wax paper to rotate. When the input paper passes through the wax paper drum, the ink is transferred to the paper through the wax paper. The wax paper drum rotates every week to complete printing

the domestic Great Wall brand 21 speed printer can print 2400 ~ 3000 sheets per hour