Proofer and the press is very different. Press used the "Rotary" Xie Gang of printing tag printing, and proofer is a "flattened circles" of printing. In addition, the printer ink, the degree of automation is very high register. Proofer is mostly adjusted by the operator based on personal experience to the amount of ink, and colored version of the registration is carried out by hand. While the proofing process, the operator must rely densitometer constantly measuring field density and 80% at the dot density and dot gain to adjust to the size and the amount of ink ink-water balance, but the process still must shovel ink ink shovel to put ink proofer roll. Therefore, the level of proof of the quality and operating personnel are closely related. Field density control dot reproduction and restore the most important technical parameters. Different companies have their own different technical indicators and error range. This technical indicator is the companies according to their specific circumstances and given. General colored version of the field density Y: 1.30, M: 1.45, C: 1.50, K: 1.80. As the error range, the European standard ± 0.07. It is said that a domestic company controlled within the range of error ± 0.05 range. Like with the printing, proofing control of water balance is very important. The principle of printing is essentially incompatible with the principle of water: the network part of the lipophilic exposure to form an image on the PS version is hydrophobic, partially hydrophilic blank unexposed not lipophilic. Therefore, to maintain a good ink-water balance is essential. Polished too little water can lead to dry version Qishi tag printing, proof is reflected in the emergence of dark tone and grade level; polished too much water will cause network deformation, dot on the sheet will be "hollow point" . So, how much water should be rubbed how to control it? In general, water polished as possible. Grasp the scale is when the stage after the water roll version can not see the presence of water. Technical parameters dampening solution quality control among proofing often overlooked factor. Technical parameters fountain solution conductivity and pH value mainly. Their criteria are: electrical conductivity of 800 ~ 1 200, pH value of 4.8 to 5.2. Development Status flexo 1, the current development of flexo flexographic printing dating back to 1853 to get the United States Hopkins rubber plates patent, and China in the early 1970s, before the introduction of the flexographic printing process, and after several technical innovation, after years of practice, only in China's packaging printing industry to establish its own position. Flexo market currently accounts for the entire printing market, about 7%. From the beginning of the 1990s, China's flexo showing a trend of rapid development in recent years is the entire printing industry in a strong position, has become one of the most developed market and development potential of printing. At present, China can meet the middle and low cigarette flexo, pharmaceutical packaging, food packaging, labels, printed stickers printed packaging requirements, cartons, paper lunch boxes, etc. are most used currently flexo. According to statistics, the domestic cigarette packaging printing flexo press for 30 per cent; for 15% of label printing; stickers printed for 35%. Cutlery, cups, drinks, etc. 80% of coated paper printing are also using the flexographic printing. Currently associated with domestic market is the largest corrugated flexo Zhangmutou tag printing, every year about 70% of sales flexible plate in the carton industry, Nestle, Johnson & Johnson, secret, aims to Durkee and other brand-name companies have adopted the flexo packaging . Transport Packaging ordinary cardboard boxes all use flexo. Quality of today's flexo printing comparable with offset printing, so some manufacturers have been producing cartons folding cartons tag web flexographic printing presses to change the folding carton sales market becomes more and more difficult situation . Today, the domestic packaging and printing enterprise applications from abroad flexo machine (including narrow, wide) and its own research and development and production of domestic narrow flexo total of 240 production lines, market share and on flexo products a new level, in addition, in the process, flexo printing can be completed online coating, die stamping and other processing, reduce costs and improve production efficiency. Zhangmutou tag printing | logo printed | beyond printing by the Dongguan City, often beyond packaging products factory provided. Dongguan Chang-ping beyond packaging products plant (www.dgcyp.com) strong, credible, in Dongguan, Guangdong paper printing industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead beyond printers and you hand into the brilliant, for a better future!