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‚‚ 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.
