/ ko • bawlt   yel • low / Cobalt yellow	Jump to pigmentMadder lake (alizarine)AzuriteBone blackBrown ochreCarmineCadmium orangecadmium yellowCerulean BlueCalcium carbonate whitesCharcoalcobalt blueCobalt greencobalt violetCobalt yellowChrome orangechrome yellowcopper resinateEgyptian blueEmerald greenGreen earthIndian yellowIndigolead whiteLemon yellowmalachiteNaples yellowOrpimentlead tin yellowPrussian bluerealgarred leadRed ochresmalttitanium dioxideUltramarineUmbraVan Dyke brownverdigrisvermilionviridianYellow ochrezinc white

1.  Overview     2. History of use     3. Making the pigment     4. Technical details

About the chemical structure:          Chemical name: Cobalt(II) aluminum nitrite Formula: K3[Co(NO2)6] · H2O Refractive index: n/a

A swatch of Cobalt yellow paint:

How can you identify Cobalt yellow?          Chemical identification: At high magnification, tiny crystals and crystalline clusters appear. It is unchanged in acids but will turn black in sodium sulfide and brown in caustic soda Spectra: Raman spectra (at University College London)   Usage and handling:          Permanence: excellent n/a   Literature:             Artists’ Pigments. A Handbook of Their History and Characteristics, Vol. 1, L. Feller, Ed., Cambridge University Press, London 1986, p. 37-46

Other yellows         (intro) - - cadmium yellow - chrome yellow - Cobalt yellow - Indian yellow       lead tin yellow - Lemon yellow - Naples yellow - Orpiment - Orpiment - Yellow ochre