How to control the viscosity of water-based ink?

How to control the viscosity of water-based ink?

author: Uvink

2023-04-26

As the main solvent of ink, water exists in a strict ratio. Adding water at will increases

the proportion of water and dilutes the ink. In fact, it changes the reasonable proportion of

various components in the ink and destroys the original ink. performance. Therefore,

it is a wrong operation to add water to ink at will, which will inevitably affect the quality of

printed products. Too much water is added, resulting in a decrease in the viscosity of

the ink, false color printing, and a decrease in color saturation. The color difference of

the printed product is obvious, and the color is seriously unevenly distributed. It also

affects the quality of the conjunctiva after the ink is dried on the printed product,

resulting in Reduced friction resistance.

The ph value of water-based ink has a lot to do with the PH value of the selected

water-based polyurethane resin or water-based acrylic resin or epoxy resin and

related additives. The main resin is weakly alkaline, and the relatively made formula

is weakly alkaline. Yes, the main resin is weakly acidic, and the ink produced is

weakly acidic. The viscosity value has a certain relationship with the added water-based

thickener and filler. Relatively speaking, the more thickener is added, the thicker it is.

Relatively speaking, the filler The more you add, the thicker it will be.

Viscosity is one of the important quality indicators of water-based ink, and it is also

an important factor in determining the printing quality. If the viscosity of ink is too low,

it will easily cause poor transferability, insufficient ink supply, uniform stripes, insufficient

ink transfer, and white spots on the printed product; if the viscosity is too high, the printed

text will be unclear, paste, and the amount of transferred ink will be too much As a result,

the ink film is too thick, prone to discoloration, difficulty in infusing and other disadvantages.

Operators must master the principle and process of ink adjustment of ink, and must not

add and adjust at will. Using a standard PH value meter during operation can easily

measure the PH value of the ink and make timely and accurate adjustments.