How should the pigments for the production of water-based inks be selected?

When producing thermal sublimation paper, it is very important to choose the right pigment. Generally speaking, the supplier of the pigment will provide several pigments with different properties for selection. The manufacturer of the ink can choose the appropriate pigment according to the actual needs. When using pigments, in addition to cost considerations, factors such as weather resistance, gloss, compatibility, and whether it is easy to disperse need to be considered.

1. Selection of opaque pigments

Opaque pigments can often provide good hiding performance, and can be widely used in printing cartons, corrugated paper, and label paper. Most of the cartons that require multi-layer printing are printed with water-based inks made of opaque pigments, while opaque pigments The particles of the example are larger, easier to disperse, and have better light fastness. Opaque pigments are also used in printing outdoors or if light fastness is required.

2. Selection of transparent pigments

When printing high quality and high requirements for printing effects such as transparency and gloss, transparent pigments can be selected. Transparent pigments have good gloss, printing strength, and dyeing strength. Transparent pigment particles are generally better than opaque pigments. The particle size is small, so transparent pigments are generally more suitable for applications with high gloss requirements.

The choice of pigments of various colors will directly affect the quality of the final ink. greasproof paper manufacturers In the water-based ink system, the use of high-resin pigments is prone to instability, mainly because of the resin and ink grinding added in the manufacturing process. It is caused by the incompatibility of the acrylic resin in the formula. If the pigment has good stability, the hue will not change when it encounters water or dehydration, resulting in color difference.