Yellow, Cadmium ochre

From the nineteenth century other pigments might be admixed or substituted for lead antimony oxide, such as cadmium yellow (cadmium sulfide) and lead chloride oxide (qq.v.). Modem paints called Naples yellow typically contain substitutes based on cadmium sulfide (or sulfide selenide) with yellow ochre or red iron oxide and a white pigment such as lead, titanium dioxide or zinc white chromium/nickel titanium yellows and those based on (parachloro-)orthonitraniline are also used (Carlyle, 2001 Wainwright et al.). 

The principal red and yellow pigments are Lead chromate chrome yellow, orange and red), zinc chromate zinc or buttercup yellow), barium chromate lemon yellow or yellow ultramarine) various products based on jerric oxide, hydrated (yellow) or anhydrous (red), both natural yellow and red ochres) and artificial Mars yellow, English red, etc.) red oxide oj lead minium or red lead) mercuric sulphide cinnabar, vermilion) antimony oxysulphide antimony cinnabar) cadmium sulphide cadmium yellow) basic lead antimonate Naples yellow). 

Titanium dioxide, zinc oxide, white lead, lithopone, antimony trioxide Carbon black, mineral black, black iron oxide Synthetic iron oxide, red lead oxide, cadmium red Chrome yellow, strontium yellow, zinc yellow, nickel titanate yellow, zinc chromate, earthen iron oxide (ochre)... 

THe colouring matter used may be of either vegetable or coal-tar origin, and is dissolved in the most suitable medium (lye, water, or fat). The older types of colouring matter—such as cadmium yellow, ochres, vermilion, umbers—have been superseded. 

Salter (1869) describes this pigment - which he also calls Penley s neutral orange - as being compounded of yellow ochre and brown madder, while Scott Taylor s edition of Field s Chromatography (1885) mentions cadmium yellow and Venetian red as components (qq.v.) this latter composition is reiterated by Church (1901). 

Brown madder. Cadmium yellow, Venetian red Yellow ochre Penley s neutral orange... 

---