Pigments which are resistant to fading or other changes due to light. If carefully protected, some pigments will stay virtually unchanged for decades, even centuries, whilst other are fugitive and will fade or darken, if exposed to direct sunlight for even a short period of time. Received wisdom holds that no painting, or other work [...]
Pigments which are resistant to fading or other changes due to light. If carefully protected, some pigments will stay virtually unchanged for decades, even centuries, whilst other are fugitive and will fade or darken, if exposed to direct sunlight for even a short period of time. Received wisdom holds that no painting, or other work on paper, should ever be exposed to direct sunlight.