Talking about Flexo Plate Making

From the perspective of the platemaking industry, the printing market has increasingly higher product quality requirements, lower production costs, and faster printing speeds. Flexographic plate printing is adapted to the needs of the market. Thicker to 175 pairs of lines can be widely adapted to the packaging industry, newspaper industry, decoration industry and so on. Materials can use coated paper, plastic film, metal sheet corrugated paper and so on. So flexible printing is more advanced than any kind of printing, faster, better quality, lower cost, and is an ideal replacement equipment.
Flexo platemaking, originally made by hand on a rubber board, is just a few simple words for the printing of corrugated boxes. Due to the continuous development of the printing industry, the requirements for cartons are getting higher and higher, and the carton printing is more visualized. There must be level and flat screen printing. Therefore, the production of such a printing plate cannot be completed by hand. Developed by the countries and scientists in the printing industry, through years of research and development, it has been transformed into a chemically sensitive, flexible version, using plates made of ultraviolet light and photographic materials. With tens of thousands of tests, the aniline resin was finally developed to produce a 1.73 to 7 cm thick flexographic plate adapted to various materials. According to the different requirements of printing, it is divided into fine version, regular version, carton version and so on. Can adapt to various specifications, high-end, mid-range, low-grade requirements.
To print fine prints, we must first have high-quality plate-making technical talents, but we must also have high-end plate-making machinery, and we need high-tech personnel. We must use flexible platesetters. The key to the machine must meet the following requirements:
1. Uniformity of illumination should be greater than 90%;
2. The originals of the film and the plate fit together without any shadow;
3, exposure lamp light a system, the accuracy of time control.
(1) The secondary exposure is the thickness of the negative side of the photochemically fixed flexographic plate, which is generally one third of the fixed material. The exposure time is derived from the experiment.
(2) The main exposure is the key plate-making work.
A. The original must be a negative edition;
B. The manuscript and the life position of the plate must be accurate;
C, manuscript and plate fitting through vacuum dense no virtual points;
D, exposure time, thick lines, moderate time, fine lines, dense, exposure to some longer, better light solid materials.
4, wash version: Wash version is the unexposed part through the scrub, clean up unwanted waste, with special attention to thin lines can not wash too long. Too long will bend the lines and affect the quality.
5, Drying: It is to wash the good flexible plate material in the oven at about 55°C for 1-2 hours, depending on the thickness of the plate material.
6, the second exposure is the exposure of the dried plate again, play the left and right side of the light and solid lines should be retained, but also play a role in India.
7, to stick. The plate has been made due to chemical raw materials, good version also feels sticky, easy to foul, so we must do to stick to the work, the plate will go to the sticky layer to expose to stick for 3-5 minutes . So that the entire flexographic plate is finished, it is better to cool for 20 hours on the flexible printing press to print more resistant to printing and improve quality. (Pre-Jinliang) (From "China Packaging News")