Yellowing refers to the development of a yellow cast in aging paint – most noticeable in the dried films of white paints or clear varnishes.
- The oxidation of solvent-based paint or varnish.
- Heat from ovens, radiators and heating ducts.
- A lack of light (behind pictures or appliances, or inside cupboards, for example).
Use top-quality water-based paints, or non-yellowing varnish.
Solvent-based paints tend to yellow, particularly when applied to areas that are protected from sunlight.