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Water based printing ink manufacturers remind us that the most important characteristics of corrugated boxes are rough paper, not a smooth surface, fast ink penetration, and most of the surface paper is dark yellowish brown, to volatilize the full ink layer, rich layers and colors unique to flexographic printing The vivid printing effect uses high-quality water-based ink.
The following water based printing ink manufacturers remind us to pay attention to some problems when using water based printing ink in corrugated paper printing!
(1) The anilox roller is used for flexographic printing to transfer ink, and the cells are small. A filter should be added to the water based printing ink bucket to prevent impurities from damaging the anilox roller.
(2) The water based printing ink should be fine in texture, and bright in color, and the viscosity of the ink should match the printing speed.
(3) The water based printing ink selected for corrugated paper printing, its connecting material is an oil-water miscible system formed by resin and water under the action of surfactant, and the stability of this system is poor.
The stability of water based printing ink depends on its pH value. When the pH value drops to about 7.8 or lower, the ink starts to become cloudy and thickened, and it is easy to the conjunctiva, which hinders the normal transmission of the ink.
The alkalinity is too strong, which will affect the anilox roller. Generally, the pH value is controlled at 8-9. The water based printing ink is alkaline, similar to soap solution, and it is easy to foam.
(4) Stir thoroughly before use to keep the ink composition uniform; after opening and use, the stored ink should be covered and sealed immediately to prevent dust from falling off and crusting dry; if the remaining ink contains impurities, it should be filtered first, and then new ink should be added. Use together; during storage, please avoid close to high temperature or scorching sun exposure, and store them for one year under normal conditions without deterioration.
(5) Reasonable use of ink additives. There are many types of additives for water based printing ink, which should be used correctly according to the instructions. Before formal printing, the printing conditions, the surface characteristics of the substrate, the ambient temperature and humidity, the storage time of the water based printing ink, and many other factors should be comprehensively considered to prepare the ink.
At present, in corrugated cardboard printing, water based printing ink has occupied a dominant position, and its printing quality has been recognized by people, and its pollution is small, so there are more and more applications.
Tel: 0086-571-85192560
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Add: No.599 Baiyunyuan East Road, Tonglu Economic Development Zone, Hangzhou.