"The Globe and Mail" is Canada's most famous newspaper and the only national newspaper in Canada. It has been devoted to reporting on international and domestic affairs. Its editorials and news reports are often quoted or reprinted by foreign newspapers. To this end, the Canadian government always sends "Global Post" to missions abroad, whose influence not only spreads throughout the country, but also enjoys prestige in the world. At present, the circulation of the newspaper is about 350,000, ranking second in the country. The weekday edition is about 40 editions, and the weekend edition is usually more than 100 editions, of which 25 to 40 editions are guaranteed to be printed in color. The main readers of The Globe and Mail are Canadian government officials, business and financial professionals, senior intellectuals and diplomats based in Canada. Compared with some "serious" newspapers in the world, the layout of the "Global Mail" is more active and novel. It often takes the form of variable columns, with more photos published, sometimes with illustrations, and pictures to strive for conciseness. In addition, in Canadian newspapers, the "Global Mail" is a newspaper that often uses color printing. The headlines, photos, advertisements, special pages and the entire supplement are often published in color. This article takes the "Global Mail" as an example to talk about the requirements of the CTP of the newspaper industry for the ability of testers. The Globe and Mail has printing sites in 6 cities in Canada, with a total of 9 sets of printing equipment. In order to continuously improve the printing quality of newspapers and at the same time to cope with the increasingly fierce market competition, the "Global Post" Group has required all its printing plants to launch CTPs since 1998. Each printing point needs to be equipped with two complete CTP Production line, but for the "Global Mail", for the first time to get involved in CTP has no experience at all, how to ensure that the use of CTP is efficient? Perhaps the "list check" method of CTP in the "Global Mail" will have some enlightenment to the newspaper printing companies that are also in doubt about the introduction of CTP. Requirements for CTP production line (1) The production of 120 printing plates per hour is based on the printing volume statistics of the printing points of the "Global Mail". (2) The number of screens can reach 133Lpi to meet the printing quality of high-end color newspapers. (3) Can realize FM screening In traditional AM screening, it is necessary to ensure that the image does not lose dots in the brightest and darkest places. However, with the introduction of CTP, the number of screen-engraving lines for plate-making continues to increase. It becomes more and more difficult to control the gap between high-gloss dots and maintain dark tone meshes. FM screening is very important. (4) There can be no major design defects To ensure the smooth completion of daily newspaper publishing. â— Complete closed quality system Ability to control the quality of newspaper publishing at all times. Requirements for testing ability (1) Establish a characterization file for the printing press in use and maintain monitoring. The indicators to be tested include: â— Dot increase / loss ratio â— Ink solid density (contrast with SNAP standard) â— Lab color gamut value of ink â— Characteristic file of printing machine â— Match the conditions of the printing press with digital proofing (2) Ensure that the printing press is in good operating condition and the product quality is stable. Find out the potential problems of the printing machine through a series of printing tests, such as: â— Is there any damage to the roller, blanket or gear? â— Does the characteristics of the printing press (field density, dot gain rate) comply with SNAP industry standards? â— Is the overprint between color and color, positive and negative sides accurate? â— In a batch of printed matter, can the ink density and dot increase be kept stable? (3) Be clear about the tests that need to be performed during the CTP production line. â— Check whether the exposure and development of the printing plate are working properly. â— Ensure that the imaging unit is finely calibrated and reliable. â— Check if the laser intensity is stable and uniform. â— The laser light path is free of dust and dirt. â— Test whether the exposure on the whole printing plate is uniform and stable. â— Environmental temperature and humidity. (4) To know whether the printing plate can be developed correctly, how much is affected by the strength of the chemical agent and the frequency of replacement. â— Check whether the developing tank is deep enough to ensure that the printing plate can have a suitable developing time (the faster the machine, the deeper the tank should be). â— Check whether all temperatures are stable and meet the manufacturer's technical indicators (such as preheating, drying, baking temperature and chemical temperature). â— Check if the chemical agent has clumped on the printing plate. â— Ensure that the pH and conductivity of the rinsed liquid are stable and meet the supplier's specifications. (5) Know how to test the printing material and adjust the printing curve to achieve the best quality. â— Determination of the ratio of dot gain / loss of the CTP plate used in combination with the agent. â— According to this, the correction curve of the RIP processor is generated to realize the linearized output from the file to the printing plate. â— Conduct printing tests to determine the dot increase rate of this combination. â— Generate the characteristic curve of the printing machine and apply it in RIP to ensure the dot amplification rate required for output. â— Use a spectrophotometer to detect the dot ratio on the printing plate. (6) The machine, materials and environment can be monitored to maintain stable quality. â— The exposure uniformity of the entire printing plate should be tested every week or when a new batch of printing plates arrives. â— Confirm the correct exposure by using color marks on each plate, and check daily for uneven laser intensity. â— Use the test version every week to check the registration of the online bending version. With this guarantee: â— Measure the ratio of dot gain / loss of the combination of CTP plate and agent used â— According to this, the correction curve of the RIP processor is generated to realize the linearized output from the file to the printing plate. â— Conduct printing tests to determine the dot increase rate of this combination. (7) Train special technicians to perform on-site maintenance of equipment and instruments, including: CTP, processor, RIP and other equipment and related software. Since the supplier's engineers cannot be on standby at all times, it is necessary to prepare their own technicians to solve the software and hardware problems on site. Therefore, they need to arrange for them to participate in the complete training of the supplier, which is generally more expensive and needs to be listed in the cost budget. The maintenance cost of the CTP production line is very high. Enterprises need to prepare for talents. In addition to the operation of software and hardware, they must also be familiar with various variables of materials and environments. At the same time, due to expensive industry expert consulting fees, companies also need their own talent reserves. diameter less than 30cm, Cotton Rope Basket Small Cotton Rope Basket,Custom Cotton Rope Basket,Storage Cotton Rope Basket,Cotton Storage Basket WENZHOU HAGO HOUSEHOLD GOODS CO., LTD. , https://www.wzhago.com