substrate, printing inks and other materials and printing conditions match, suitable for printing performance, called Printability.
Printing ink suitability, refers to the printing inks and conditions matching, suitable for printing performance. The main viscosity, adhesion, thixotropy, dryness and so on.
Viscosity of Ink
Ink in the flow of the internal friction characteristics, called ink viscosity, measuring ink viscosity of the physical quantity, called ink viscosity.
The viscosity of the ink can be measured by the viscometer, commonly used viscosity meter has parallel plate viscometer, rotating viscometer, Are viscometer and so on.
The faster the printing presses, the greater the fluidity of the ink, the smaller the viscosity.
The viscosity of the ink can be adjusted by inking oil or ink thinner.
Adhesion of inks
Ink from ink fountain to rollers, plates, (blanket) substrate surface transfer, ink Film First Division, and then transfer, the ink film in this dynamic process of the performance of the ability to prevent the rupture of the ink film, called Ink adhesion. Measuring the physical amount of ink adhesion, called the Tack value of ink.
The Tack value of the ink can be measured by the adhesive of the ink.
In the printing process, if the ink adhesion and substrate performance, printing conditions do not match, the paper will be the drop of powder, wool, ink overprint bad, printing plate dirt and other printing failures.
The viscosity of the ink, can be used to remove viscosity or zy ink additives to adjust.
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