Printing plate grime is a common problem in the printing process. Policies and regulations plague many printing companies. Moreover, because of its various reasons, the processing methods are not the same. If the method is not properly selected, it will also damage the printing plate Huaguang Precision, which will bring huge losses to the printing company. For this reason, the printing industry constantly explores and analyzes in practice and puts forward many effective solutions. Since the beginning of the 8th "Printing Technology" National Prized Essay Contest, the editorial department of "Printing Technology" has received a lot of relevant articles, and one of them is now selected to be shared with readers. At the same time, we also warmly welcome more readers to participate in this event and share your experience and experience with us.
For a long time, printing plates have always been a very vexing problem. Many printing companies set up special personnel to inspect the printing plate stains in the printing section, but it is still inevitable that there are omissions. Therefore, after the printing and packaging city and printing plates are on the machine, the printing staff will also conduct another inspection. For general smears, they often use modified paste for processing, however, due to the different reasons for the formation of the dirty tracks, the different locations appear, some of the dirty tracks can not be simply removed with a revised version of the paste, but also need another Think of some solutions to solve. For this reason, based on my long-term practical experience, the author summarized the following methods for handling the printing plate grime: CTP in China for your reference.
When the stain of the printing plate is in the picture and text, it can not be treated directly with the revised paste. The needle drawing method can be adopted. That is, the sewing track is gently opened by the sewing needle according to the angle of the dot, and then some Cleaner fluid. Manroland knife scraping method for the baking and aging of the printing plate after the printing exhibition, the image of some large dirty tracks, long lines, etc., can not be removed with a revised paste, at this time can use the utility knife in the dirty plate Trace back and forth a few times, and then wipe some stencil.
Manual local development labeling is used to attach the transparent glue liquid on the film when it is put on the mouth, hangs the nail, and sticks the color mark. After being exposed to heat, it is transferred to the top of the plate. The photosensitive film on the plate is stuck by the glue. Can't develop, causing the plate to be dirty. This kind of dirty mark is not solid, and it is scattered. If the dirty mark is packaged in the blank space, it can be repaired with a revised paste. If it is in the graphic, you must use a sponge to pick up some developer and gently wipe it. Then Quickly wash off with water.
The soap scrub method has a very special kind of stain. Generally, a series of radial grime offsets will appear shortly after printing on the machine. The above various revision methods cannot be handled cleanly. For some time, my company's printing plate also had this kind of problem, and it lasted for several months, damaging hundreds of plates. After our hard research and analysis, we found the real cause/organization. The original problem was in the developing brush wheel. After the brush is used for a long time, there will be some irregular wear. When developing, the photosensitive layer of the printing plate can not be in close contact with the brush. Therefore, the ink balance, the developer only works on the surface of the printing plate, and the role of the inner layer is not Thorough, resulting in the printing plate on the machine for a period of time, there will be intermittent stains appear. In response to this situation, we used a soap-scrubbing method and the effect was very good. This is mainly because soap is a weakly alkaline substance and is often used to clean printing plates to make up for the lack of development. It does not harm the printing plates and graphics. The situation that this company generates is a kind of underdeveloped one. Of course, if the film is covered, this problem should be solved. In the end, the worn-out brush wheel should be replaced, so that the dirty track will no longer appear. X-Rite sees that the problem of the stains on the printing plate cannot be solved with the revised version of the paste. It should be good at distinguishing and analyzing packaging and decoration. It is good at solving problems with simple and effective methods to save time and effort. The best way to save money.
For a long time, printing plates have always been a very vexing problem. Many printing companies set up special personnel to inspect the printing plate stains in the printing section, but it is still inevitable that there are omissions. Therefore, after the printing and packaging city and printing plates are on the machine, the printing staff will also conduct another inspection. For general smears, they often use modified paste for processing, however, due to the different reasons for the formation of the dirty tracks, the different locations appear, some of the dirty tracks can not be simply removed with a revised version of the paste, but also need another Think of some solutions to solve. For this reason, based on my long-term practical experience, the author summarized the following methods for handling the printing plate grime: CTP in China for your reference.
When the stain of the printing plate is in the picture and text, it can not be treated directly with the revised paste. The needle drawing method can be adopted. That is, the sewing track is gently opened by the sewing needle according to the angle of the dot, and then some Cleaner fluid. Manroland knife scraping method for the baking and aging of the printing plate after the printing exhibition, the image of some large dirty tracks, long lines, etc., can not be removed with a revised paste, at this time can use the utility knife in the dirty plate Trace back and forth a few times, and then wipe some stencil.
Manual local development labeling is used to attach the transparent glue liquid on the film when it is put on the mouth, hangs the nail, and sticks the color mark. After being exposed to heat, it is transferred to the top of the plate. The photosensitive film on the plate is stuck by the glue. Can't develop, causing the plate to be dirty. This kind of dirty mark is not solid, and it is scattered. If the dirty mark is packaged in the blank space, it can be repaired with a revised paste. If it is in the graphic, you must use a sponge to pick up some developer and gently wipe it. Then Quickly wash off with water.
The soap scrub method has a very special kind of stain. Generally, a series of radial grime offsets will appear shortly after printing on the machine. The above various revision methods cannot be handled cleanly. For some time, my company's printing plate also had this kind of problem, and it lasted for several months, damaging hundreds of plates. After our hard research and analysis, we found the real cause/organization. The original problem was in the developing brush wheel. After the brush is used for a long time, there will be some irregular wear. When developing, the photosensitive layer of the printing plate can not be in close contact with the brush. Therefore, the ink balance, the developer only works on the surface of the printing plate, and the role of the inner layer is not Thorough, resulting in the printing plate on the machine for a period of time, there will be intermittent stains appear. In response to this situation, we used a soap-scrubbing method and the effect was very good. This is mainly because soap is a weakly alkaline substance and is often used to clean printing plates to make up for the lack of development. It does not harm the printing plates and graphics. The situation that this company generates is a kind of underdeveloped one. Of course, if the film is covered, this problem should be solved. In the end, the worn-out brush wheel should be replaced, so that the dirty track will no longer appear. X-Rite sees that the problem of the stains on the printing plate cannot be solved with the revised version of the paste. It should be good at distinguishing and analyzing packaging and decoration. It is good at solving problems with simple and effective methods to save time and effort. The best way to save money.
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