Description Colour Index PB 29 & PW 4 & PW 6 Drying Speed Average Opacity Covering and Tint Power Opaque Lightfastness Excellent Oil Content Low, Linseed Toxic No Conforms To ASTM D-4236 ƒ‚‚ A deeper version of the Kings Blue Light blend. Useful for such features as architectural modeling in backgrounds, flowers, interiors, skies and accent colours. This name was given by English manufacturers to Smalt, a Cobalt based pigment which was used in the 16thƒ‚‚ -17th centuries as a less expensive alternative to Lapis Lazuli. Unfortunately, Smalt was prone to fade into a light grey, as some Veronese skies demonstrate. But the introduction of Ultramarine Blue made the original Smalt formula obsolete, and so I offer a completely reliable substitute blend which evokes the aerial effects of the great Venetian decorators
