Which type of pigment is notable for its lightfastness when exposed to light?

Inorganic pigments are known for their exceptional lightfastness, meaning they resist fading and discoloration when exposed to light over time. This characteristic is primarily due to their chemical stability and composition. Inorganic pigments, such as titanium dioxide or iron oxides, are derived from mineral sources and possess strong bonds that enable them to withstand environmental factors, including UV radiation.

Lightfastness is an essential quality in art materials, as artists seek pigments that can maintain their vibrancy in various lighting conditions. While organic pigments may offer a broader palette with more vivid colors, they often have less lightfastness. Synthetic pigments can vary in lightfastness depending on their formulation, and natural dyes typically exhibit lower lightfastness compared to inorganic options.

Thus, inorganic pigments stand out as a reliable choice for artists aiming for longevity and durability in their work.