Patent Yellow, Turner's yellow, or Montpellier yellow, is a submuriate or chloruret of lead, which metal is the basis of most opaque yellow pigments: it is a hard, ponderous, sparkling substance, of a crystalline texture and bright yellow colour; hardly inferior, when ground, to chromic yellow. It has an excellent body, and works well in oil and water, but is soon injured both by the sun's light and impure air; it is therefore little used, except for the common purposes of house-painting, etc.