What are the properties of pigments

1. Alkali resistance: It is very stable to any concentration of alkalis and other types of alkaline substances, especially cement and lime mortar commonly used in construction, and does not pulverize or affect cement building components. Strength of.

2. Acid resistance: It has resistance to general weak acids and dilute acids, but it can also gradually dissolve in strong acids, especially when heated and concentrated.

3. Lightfastness: The color does not change under strong sunlight exposure.

4. Heat resistance: It is stable within the temperature limit of 2000 ℃. When it exceeds its temperature limit, the color and luster begin to change. As the temperature increases, the degree of change becomes more and more significant. The temperature limits of common iron oxide pigments are as follows:

Iron oxide yellow gradually changes to red phase when it exceeds 130℃

Iron oxide red gradually changes color to deep red when it exceeds 300 ℃ (Rongchi iron oxide red can generally reach 500 degrees)

Iron oxide purple gradually changes color to dark red when it exceeds 400℃, and iron oxide black gradually changes color to dark red when it exceeds 100℃

Iron oxide brown gradually changes color to red when it exceeds 130℃, and iron oxide green gradually changes color to dark red when it exceeds 200℃

(Note: Because the iron oxide manufacturers are different, the limits of the products produced will also be different. The above are the temperature limits of common iron oxide pigments.)