S Label Printing Ink - stickers, ink - office supplies industry - stone texture - China seamless stone texture
With economic development, the application of labels in a wide range of goods, led the label printing industry's rapid development. But now people are understanding the label is far less than the printing ink on the label material, printing, etc. to understand, label printing inks, such as a mysterious area of cognitive and waiting for us to explore.
Many types of label printing ink, according to the different solvent, can be divided into three categories?? Water-based label printing ink, solvent ink and UV label printing label printing ink: water-based ink health and safety, pollution-free, consistent with environmental requirements, is conducive to human health; but there are also disadvantages, such as slow drying, color saturation is not high, poor stability, the field should not be printing a large area, long home prone to sedimentation, stratification. solvent printing ink on the label label materials adaptable, stable performance, high quality printing; but there are environmental problems, some volatile solvents harmful. UV label printing ink performance, reliable, widely; but the price is high, and take special drying equipment, auxiliary materials, there are certain requirements.
In the choice of label printing ink to be taken into account when the type of printing material, printing and printing conditions, the customer's special requirements, finishing process, the label uses and conditions of use and cost of several factors. Performance label printing inks include hue, fineness, saturation, gloss, adhesion, viscosity, drying, etc, these properties of the printing process and print quality have a significant impact.
Print shop environment on the ink properties and printing quality, mainly in the following two aspects:
(1) Ink viscosity and drying temperature of the environment sensitive to temperature, the ink viscosity decreases, the drying rate was faster;
The other hand, increased ink viscosity, dry slower. In addition, the environmental humidity on the drying of the ink also affects the workshop is not conducive to ink drying humidity is too high; if the plant is too dry, easy to cause printing failure due to static electricity.
(2) the health status of the printing plant is also important, therefore, the printing shop to keep clean, no dust, exhaust ventilation and good.
In the printing process, ink adhesion fastness often encounter poor, poor ink drying, ink adhesion, bubbles, paste version, dry version, poor ink transfer, color cast and so on, for these failures is as follows:
(1) ink fastness and poor adhesion. Cause: The printing surface tension is too low, ink and printing materials, the type does not match the ink and poor performance. The solution: surface treatment of the printing material, adding tension of wetting agent reduces ink, replacement ink.
(2) poor ink drying. Reason: improper ink solvent ratio, fast printing speed, relative humidity is too high. Solution: adjust the solvent ratio, appropriate to reduce the printing speed, increasing the drying temperature, reduce the environmental humidity.
(3) ink layer adhesion. Reason: poor ink drying, ink is too soft, printing excessive pressure, relative humidity is too high. Solution: adjust the proportion of ink solvent, adding appropriate anti-viscosity, increasing the drying temperature, reduce the printing pressure, reduce the environmental humidity.
(4) bubble. Cause: The ink containing air, the surface tension of ink is too large, low viscosity ink, printing was speeding. The solution: adding appropriate defoamer, adjust ink viscosity, appropriate to reduce the printing speed.
(5) paste version. Cause: The ink pigment particles are too rough, too high viscosity ink, the ink excessive printing pressure too high. The solution: replace the ink, the appropriate lower ink viscosity, reducing the ink, reducing printing pressure.
(6) dry version. Cause: The ink drying too fast, the drying temperature is too high, so the printing is too slow.
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