If the coloring medium is composed of water or polar organic solvents (such as lower fatty alcohols, etc.), and a resin binder with strong polarity (such as acrylic resins, etc.), it is an improvement in the use of organic pigments as colorants in water-based paints or for the ease of dispersibility and stability of the dispersion system in water-based inks, the pigments should be surface modified to increase the hydrophilic or media-philic properties of organic pigments.

According to different types of coatings, such as solvent-based coatings, water-based coatings, latex paints, interior and exterior wall coatings, and metal surface decorative coatings, higher requirements are put forward for their colorants. Colorants suitable for coloring should have the following main characteristics:

1. Excellent durability, light and weather fastness, especially for outdoor paint colorants.

2. High opaque or specific transparency, high color strength and gloss. The organic pigment toners of Qingdao Sanhuan Colorchem have high color strength and high gloss. Pigment can be customized according to different requirements of customers.

3. It has good compatibility (matching) and easy dispersibility with different types of exhibiting materials or media systems.

4. The colorant of solvent-based coatings should have good solvent resistance, that is, anti-crystallization (NC) and anti-flocculation (NF) characteristics, without changes in shade and color strength.

5. The pigment for water-based paints has good water resistance, and the coloring system does not swell.

6. It is resistant to chemical reagents and has excellent acid and alkali resistance.

7. Good heat resistance and storage stability, no delamination and precipitation; no floating phenomenon in the paint, preventing color streaks on the surface of the dry paint film.