Analysis of common ink faults in the most popular

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Analysis of common faults of ink in the printing process

surface crusting

in the printing process, when adding new ink, sometimes you will find that there are different degrees of film on the ink surface around the ink bucket. If these film is added to the ink bucket, it will seriously affect the ink supply performance of the machine

1. Cause

the binder in offset printing ink is composed of synthetic resin, vegetable oil and high boiling mineral oil. At present, flaxseed oil, which is widely used in offset printing rotary ink, is dry oil. Because this kind of oil contains more unsaturated fatty acid groups, it can evenly absorb oxygen in the air, oxidize and polymerize into a tough solid film, so offset printing rotary ink has good dryness in the air. At the same time, due to the use of some inorganic pigments (such as iron blue) in the ink formula, the ink is prone to surface scaling during storage

2. solution

some anti drying agents can be added in the ink production process (the main factor that restricts the development of biodegradable soy protein plastics is the high price). Because most of them are strong reducing agents, they can be oxidized preferentially, so they can delay the oxidative polymerization of dry oil. In addition, the ink should be avoided to be exposed to the air for a long time

the above are common failures of newspaper printing ink in production. In the process of printing, the loading speed cannot be adjusted. No matter what fault you encounter, you should carefully observe it, make a systematic analysis in combination with the actual production of the table, and then find out the solution to the problem. For the problems that cannot be solved at the moment, you can eliminate them one by one, and finally solve the problem completely

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