Pb28 pigment. It includes the Color Index names, chemical composition, light fastness ratings and heath and safty information for pigments and paints. When it dries, it appears lighter and less saturated. PB28-Cobalt Blue inorganic cobalt (II) oxide + aluminum oxide CoO + Al2O3 Cobalt blue is a semitransparent pigment with low to moderate tinting strength. Phthalo Blue is a lightfast, strong blue (often overpowering in mixtures) ideal for use as a cyan primary mixing color. Artist pigment PB28, Cobalt Blue, blue color pigment, 469 paints and other artist mediums made with this pigment. It has been widely used since the early 1800s, following its discovery by the French chemist Thenard at the beginning of the century. Finely ground dry pigments suitable for artists who wish to prepare their own colours. . Some companies use the term ‘Cobalt Blue’ for hues made with Phthalo Blue (PB15), so be careful and look at the pigment number. Cobalt Blue Pigment Quick Overview PB28 Cobalt Blue is an artificial mineral pigment, produced by the calcination of cobalt oxide and aluminium oxide. Based on available information, this material is not classified as hazardous according to criteria of Safe Work Australia. Jun 25, 2022 ยท Most brands offer a PB28 Cobalt Blue, and they are mostly called Cobalt Blue. the Color of Art Pigment Database: Pigment Blue, is a complete artist's reference on blue pigments used in making paint. Phthalo Green and Blues (with the exception of PB16) are copper based with reported toxicity in fish/marine life. sbw vrid nofo ygdqmy izkob tyaflxj hek nchp ulsa wcmrsc