Definition: An orange opaque pigment is a colored substance used to impart a bright, non-transparent orange color to paints, coatings, inks, plastics, and other materials. Its opacity means it effectively blocks light, preventing any underlying surface from showing through
Chemical Nature: Orange opaque pigments can be organic or inorganic
Opacity: High opacity due to particle size and refractive index, which scatters and absorbs light.
Lightfastness: Varies depending on pigment type; inorganic generally more lightfast than organic.
Heat stability: Inorganic pigments typically have good heat resistance.
Toxicity: Depends on chemical composition (cadmium pigments are toxic; iron oxides are safer).
Particle size: Typically micron-sized to maximize opacity.
Chemical stability: Resistant to acids, alkalis, and solvents, particularly inorganic types