Pigments Powder and Pigment Paste play a crucial role in water-based printing inks, as they directly affect key properties such as color, coverage, glossiness, and stability of the ink. The following are several key uses of pigments in water-based printing inks:

1. * * Color imparting * *: Pigments are the main components that impart color to water-based inks. They can meet the color requirements during the printing process, ensuring the color accuracy and consistency of printed materials.

2. * * Covering Power * *: Some opaque pigments can provide good covering power in water-based inks, which is particularly important for printing occasions that require covering the underlying color or paper texture.

3. Glossiness: Transparent pigments can provide higher glossiness in water-based inks, making the printed surface appear smoother and more attractive.

4. Stability: The stability of pigments is crucial for the overall performance of water-based inks. Pigments with good alkali resistance can ensure stable operation of ink within the pH control range, avoiding changes in ink performance caused by pH fluctuations.

5. Dispersion: The dispersibility of pigments directly affects the rheological properties and printing quality of inks. Good dispersibility can ensure even distribution of pigments in ink, avoiding phenomena such as floating, blooming, and sedimentation.

6. Durability: Pigments with properties such as sun resistance, heat resistance, and chemical resistance can enhance the durability of water-based inks, allowing printed materials to maintain stable color for a long time in outdoor or harsh environments.

7. * * Environmental Performance * *: The pigments used in water-based inks usually need to meet environmental requirements and be free of harmful substances to ensure the safety and environmental friendliness of printed materials.

8. Compatibility: Pigments need to have good compatibility with other components such as binders and additives in water-based inks to ensure the overall performance and printing effect of the ink.

When choosing pigments, the following factors need to be considered:

-Alkali resistance: Ensure the stability of the pigment within the pH range of water-based ink.
-Relative density: Avoid pigment precipitation or floating caused by density differences.
-* * Combination and Matching * *: The physical and chemical properties of different pigments may vary, and a reasonable combination is needed to ensure ink performance.
-Gloss and Transparency: Choose transparent or semi transparent pigments according to the requirements of the printed material.
-Dispersion equipment: Choose the appropriate dispersion equipment to ensure that the pigment is evenly dispersed in the ink.
By considering these factors comprehensively, it can be ensured that the application of pigments in water-based printing inks achieves optimal results.