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Use, storage and management of ink
- Apr 11, 2018 -

1 New ink storage conditions. The viscosity of the ink decreases as the temperature rises, and the temperature decreases and the viscosity increases. Some inks placed in the environment below 3°C or below 0°C will freeze into a jelly state. The so-called gelling phenomenon occurs. If the ink is “gelled”, it usually needs to be heated to temperatures beyond the gel point temperature of 5-10°C to restore the original state. . Therefore, in cold areas, the winter storage of ink should pay special attention.

When storing ink in winter, it should be stored in a non-fire source, try to warm some rooms, and avoid stacking outdoors. If gelling occurs, place it in hot water and allow the insolubles to return to their original condition. Otherwise, it will cause troubles such as clogging of the mesh in printing and blockage of the layout. For the sake of caution, these problems can be ruled out by filtering with metal mesh before use.

2 adjust the use of the new ink during storage. Even if the new ink is stored for a long period of time, various components of the ink formulation may sometimes be separated and precipitated. This may sometimes cause the inner wall of the container to rust and cause troubles in the printing. To avoid these problems, you must follow the instructions. The number and order of bins are used one after the other.

3 ink stirring use. As mentioned earlier, the long-term storage of the ink tends to cause delamination of the ingredients in the formulation, or precipitation. Therefore, even if it is a new ink, the ink tank must be inverted, shaken, or slightly mixed before use.

4 About the management of the remaining ink. Since the solvent used for the gravure plastic ink is a low-boiling point solvent, volatilization during the printing process may cause misalignment of the solvent, or the cooling of the solvent may cause the surface of the ink or the surface of the roller to be extremely cooled, resulting in the air Moisture penetrates into the ink. In addition, in the printing process, due to the debris of the film and the dust inhaled into the ink and other reasons, in particular, the pattern area is small, and the amount of ink is less likely to change. The remaining ink tends to have a lower viscosity, and separation and precipitation occur faster. Therefore, when it is reused, it must be fully stirred or filtered with a mesh of 100 mesh or more, and then mixed with the new ink for digestion.

If you continue to store it, it must be sealed, marked with the type of ink, attached with the mark, and placed in a dark place.