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Key Points for Storing and Maintaining New and Used Ink

In the printing industry, the quality and stability of ink have a direct impact on the printing results. Whether it is newly purchased ink or leftover old ink during usage, the correct storage method is crucial for ensuring the quality of the ink.

Issues and Methods to Be Noted When Storing New and Old Ink


Storage of New Ink


  • Temperature Control


The viscosity of ink changes with temperature. In cold regions, especially in winter, ink should not be placed in environments below 3℃ or 0℃ to prevent gelling. If gelling occurs, the ink should be warmed to 5~10℃ above the gel point to restore its original state.


  • Mixing Ingredients


Ink that has been stored for a long time may experience separation or sedimentation. Before use, the ink barrel should be inverted, shaken well, or stirred to ensure that all ingredients in the ink formula are evenly mixed before use.


Management of Old Ink


  • Stirring and Filtering


Since old ink may experience reduced viscosity and separation sedimentation, it must be thoroughly stirred before reuse. If necessary, filter the ink using a 100-mesh or finer metal screen to remove any impurities that may have mixed in.


  • Mixing with New Ink


Mixing treated old ink with new ink can better utilize the old ink, avoiding waste.


  • Sealed Storage


If old ink is not used immediately, it should be sealed and stored to prevent solvent evaporation and moisture intrusion from the air. Also, label the type of ink and attach a tag, storing it in a cool place to maintain ink stability.


By following the above methods, you can effectively maintain the quality of new and old ink, ensuring stable performance of the ink during the printing process, thereby improving the quality of printed products. Proper ink storage and management are crucial for printing companies, as they can reduce quality issues, improve production efficiency, and enhance economic benefits.

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