At present, the use of laser image-setters is still relatively common. How to improve the quality of printing plates under the conditions of existing processes and equipment, restore original manuscript information to the maximum, and meet higher and higher printing quality requirements have become a priority for us. Question. This article combines working practices and talks about some experiences and experiences in improving the quality of printing.
First, strictly check the quality of plate-making film
Check the operation notice to ensure that the number of plates is complete, and the elements are correct. Check whether the film is stripped, scratched, creased, yellowed, or dark. If any problems are found, communicate with the previous process in time and deal with it as soon as possible. For the tape on the film, printed paper, dust and dirt, gently wipe with a clean, soft gauze and alcohol to ensure that the machine film is clean.
Second, carefully clean the plate glass plate
The degree of cleanliness of the glass plate of the printing machine has a great influence on the printing quality. Even a small hair may cause all the printing jobs to be scrapped. Therefore, before the printing, you must carefully wipe the dust and fingerprints on the glass plate of the plate. For more stubborn dirt, such as tape, paper, oil, etc., wipe it repeatedly until it is completely removed. Due to the reflection of the glass plate, checking the glass plate from one direction tends to miss some dirt. Therefore, it is necessary to carefully inspect from various directions to ensure that the glass plate is clean. In addition, after each printing of a printing plate, it is necessary to re-examine whether there is any stain on the glass plate. There must be no luck. Otherwise, the printing plate quality cannot be guaranteed.
Third, the production of printing calipers to improve accuracy
This unit uses the Heidelberg CD-102 four-color offset press. The accuracy requirements for the printing version are: bite error ≤ 0.1 mm, and side rule error ≤ 1.9 mm. Since the distance of 0.1 mm is barely controllable with the naked eye, it is difficult to grasp with a scale. In order to reduce the error and improve the accuracy, the stencil of self-made printing plate made of discarded PS plate has the same width as the bite, the length is equal to the width of the plate, the production is simple, the operation is convenient, and the printing plate accuracy and work efficiency are greatly improved after use.
With the maturity of CTP technology, the rapid publication speed, good plate stability, and high dot reproducibility have greatly improved the quality of printing plates. Traditional printing plates will gradually disappear from people's perspective, but the current drying The version process and precautions still require everyone to keep in mind.
First, strictly check the quality of plate-making film
Check the operation notice to ensure that the number of plates is complete, and the elements are correct. Check whether the film is stripped, scratched, creased, yellowed, or dark. If any problems are found, communicate with the previous process in time and deal with it as soon as possible. For the tape on the film, printed paper, dust and dirt, gently wipe with a clean, soft gauze and alcohol to ensure that the machine film is clean.
Second, carefully clean the plate glass plate
The degree of cleanliness of the glass plate of the printing machine has a great influence on the printing quality. Even a small hair may cause all the printing jobs to be scrapped. Therefore, before the printing, you must carefully wipe the dust and fingerprints on the glass plate of the plate. For more stubborn dirt, such as tape, paper, oil, etc., wipe it repeatedly until it is completely removed. Due to the reflection of the glass plate, checking the glass plate from one direction tends to miss some dirt. Therefore, it is necessary to carefully inspect from various directions to ensure that the glass plate is clean. In addition, after each printing of a printing plate, it is necessary to re-examine whether there is any stain on the glass plate. There must be no luck. Otherwise, the printing plate quality cannot be guaranteed.
Third, the production of printing calipers to improve accuracy
This unit uses the Heidelberg CD-102 four-color offset press. The accuracy requirements for the printing version are: bite error ≤ 0.1 mm, and side rule error ≤ 1.9 mm. Since the distance of 0.1 mm is barely controllable with the naked eye, it is difficult to grasp with a scale. In order to reduce the error and improve the accuracy, the stencil of self-made printing plate made of discarded PS plate has the same width as the bite, the length is equal to the width of the plate, the production is simple, the operation is convenient, and the printing plate accuracy and work efficiency are greatly improved after use.
With the maturity of CTP technology, the rapid publication speed, good plate stability, and high dot reproducibility have greatly improved the quality of printing plates. Traditional printing plates will gradually disappear from people's perspective, but the current drying The version process and precautions still require everyone to keep in mind.
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