At present, the world's advanced printing process is using CTP technology (computertoplate), that is, computer direct plate-making process, and CTP plate material is the core part of CTP technology. CTP plate materials are currently mainly composed of three categories: thermal plate, silver plate and photopolymerization plate. However, the prices of these three types of plate materials and plate-making equipment are very expensive, so that many domestic printing plants, especially small and medium-sized printing plants, are in the wait-and-see stage for CTP plates. They hope to develop a low-cost and effective CTP plate.
In recent years, inkjet printers have made great progress, mainly reflected in higher printing speed and resolution, longer print head life, and higher screen quality, such as Epson 4800, 7800, 9800 and other printers. Century Rainbow K3 pigment ink with a resolution of 2880 × 1440DPI and a minimum ink drop of 3.5 picoliters. The fine ink drop and intelligent ink drop conversion technology ensure high-quality output. Reached the precision of 175 lines / 2540DPI of laser imagesetter, so it can be used for color printing and plate making. In addition, the price of inkjet printing system equipment and consumables is low, and the process is simple, so the cost of plate making is low. This has led to the rapid development of inkjet direct platemaking, which can be widely used in the printing of books and newspapers.
1. Plate-making process and advantages of inkjet CTP plate:
The plate-making process of inkjet CTP can be generally divided into two types: PS plate type inkjet CTP plate and bare plate type inkjet CTP plate.
1. PS version inkjet CTP version
PS version inkjet CTP version is to apply a transparent ink absorption layer on the ordinary PS version, and then use the inkjet printer to print graphics on the ink absorption layer. After printing, developing and washing, the printing plate can be printed on-hook. Compared with the traditional PS version process, it eliminates the need for film, imposition process and corresponding equipment. At the same time, the plate-making time is shortened, and the plate-making cost is greatly reduced. PS plate type CTP plate material has been successfully developed by Pratt and Beijing Printing Institute in China, and began to be produced and sold.
2. Bare inkjet CTP version
Bare inkjet CTP offset printing plates do not require printing and imaging. There are two types. The first is to coat a layer of ink absorbing layer on the aluminum mesh base of sand mesh first, and then inkjet imaging on the absorbing layer. The absorbing layer must have strong ink absorption and high adhesion to the aluminum base degree. The second is inkjet imaging directly on the aluminum mesh substrate.
Second, foreign nude version inkjet CTP version
The main foreign manufacturers of bare-plate inkjet CTP plates are Jetplatesystems of the United States and Glunz & Jensen of Denmark. American Jetplatesystems successfully launched the JetPlateCTP system. It is developed on the basis of the EpsonStylusClour3000 inkjet printer. It improves the transmission device to make the positioning accuracy of the printing plate reach ± ​​0.05mm and prints on the printing plate with a special platemaking ink called liquid light. This platemaking The ink reacts with the coating applied to the aluminum plate to fix it on the aluminum plate. After development, the non-graphic part of the coating is removed, and then the plate is fixed to obtain a printing plate that can be used for machine printing. . The imaging resolution of the JetPlateCTP system is 2880DPI equivalent to 175 lines / inch. It can print 15 editions per hour. After two baking editions, the printing resistance can reach 100,000 impressions. It does not require printing, but still requires printing plates such as developing and washing.
The second bare type inkjet CTP version
The second type of bare-plate inkjet CTP plate is an inkjet printing image directly on an aluminum plate base without electrolytic film coated with photosensitive resin to make a printing plate. For example, the plate printing machine 4200 system (PlateWriter 4200) launched by Glunz & Jensen company is based on the principle that the 4200 system is used to spray a liquid dot (LiquidDot) on the aluminum substrate after electrolytic sand mesh and anodization. The imaging solution is formed, and then sent to the plate processing equipment for drying, so that the liquid dot image is fixed on the plate, and finally the plate is coated with protective glue.
The inkjet printing device of the printing plate printer 4200 system is composed of 540 nozzles, which can realize high-definition printing and achieve an output accuracy of 175 lines / inch. The plate-making speed is 5-15 folios per hour.
3. Domestic bare-plate inkjet CTP version
Recently, Pratt China has also developed a bare-plate inkjet CTP offset printing plate, which was exhibited at the 2007 Langfang Printing Exhibition and the 2007 Beijing International Printing Exhibition. The difference between it and the bare type inkjet CTP offset printing plate abroad is that foreign countries need to use special printing equipment, such as the JetPlate4000 and Jetplate7600 system printers in the United States, and the PlateWriter4200 system printer in Denmark. The bare-type inkjet CTP offset printing plate developed by Pratt and Co., Ltd. can print images on the aluminum plate substrate with special treatment of electrolysis and oxidation using a common Epson inkjet printer, which saves the cost of investing in special equipment.
Pratt has successfully developed a pigment ink that can be printed on a bare aluminum base and is suitable for machine printing. This kind of pigment ink has proper viscosity and smooth printing without blocking the ink head. After printing on the aluminum base, the ink can quickly adhere to the base without flowing and causing blurring of the graphics, and can cause cross-linking by heating, so that the graphics are quickly cured, and the durability of the printing plate is improved. Use this kind of pigment ink to print on the aluminum substrate after electrolysis and oxidation treatment, and then go through the plate fixing treatment (240-250 ℃ plate fixing for 2-5 minutes) to make the bare plate inkjet CTP offset printing plate.
The bare-type inkjet CTP version produced by Pratt uses Epson1800 and 4800 inkjet printers, and the printing resolution can reach 5760 × 2880 and 2880 × 1440, and the resolution can reach more than 175 lines / inch. The printed text is clear and the plate-making speed is 6-12 sheets per hour. The printing capacity is 30,000. It has good printability and can be printed with alcohol fountain solution or water fountain solution.
Fourth, the printing plate advantage
Bare inkjet CTP version has the following advantages:
(1) Belong to the environmental protection type CTP
The computer directly publishes without using materials such as film and imposition process. The plate-making process is simple, without the need for printing, developing, washing and other processes, shortening the plate-making time, and without environmental pollution, it is an environmentally friendly printing plate material.
(2) Reduce the cost of plate making
The printability of bare-plate inkjet CTP plate is the same as that of PS plate, which is familiar to printers, but the plate-making process is reduced. No need for film and imposition, printing, developing, washing and other processes, it is a processing-free CTP plate. It is convenient and environmentally friendly, and due to the low price of inkjet printers and low ink prices, it greatly reduces the overall cost of plate making, so it is suitable for popularization and application.
The product descriptions of cotton Panty Liners
1. 100% Pure Cotton Panty Liners
2. No stimulation
3. Super breathable base film
4. Kampo herbal extract.
The product features of cotton panty liners
1. Cotton spunlace cloth
2. Clean paper
3. Breathable base film
4. Double-sided gum
5. Release paper
6. Non-woven package
FAQ:
What is your Min. order quality?
A: One twenty-foot container, small quality available if has stock
Your supply ability?
A: 5,000,000 piece/pieces per week Sanitary Napkins in bulk
What is your neareast port?
A: Shenzhen
What is the payment terms you accepted?
A L/C, T/T, Western union, MoneyGram
Cotton Panty Liners
Organic Cotton Panty Liners,Cotton Panty Liners Brands,Pure Cotton Panty Liners,Natural Cotton Panty Liners
Glory Power Hygiene Products Ltd. , https://www.hygienenapkin.com