...Some of this Delft wareis very fine in quality, the cobalt blues under the glaze beingremarkably soft and rich in colour... 
Richard Glazier 「A Manual of Historic Ornament」
...With experience, however, and due care, this isa serviceable colour; yielding with white most delicate flesh tints, andin minute proportion with cobalt or French blue and white, tender aërialgrays...
George Field 「Field's Chromatography」
..., and areobtained by the action of heat on mixtures of earthy or metallic baseswith cobalt...
George Field 「Field's Chromatography」
...They are divisible into three classes—the stannic cerulianblue, the aluminous cobalt blues, and the siliceous smalts...
George Field 「Field's Chromatography」
...With regard tosmalts, they are, as artist's pigments, inferior in stability to otherblues of cobalt...
George Field 「Field's Chromatography」
...Thepurity of the colour, however, does not altogether depend on thecompound of cobalt used; in a great measure—as with other pigments—itrests on the purity of the materials...
George Field 「Field's Chromatography」
...To obtain a perfect blue, neitherinclining to purple nor green, the cobalt and alumina should be freedfrom iron, and the former, as much as possible, from nickel also...
George Field 「Field's Chromatography」
...In commonwith cobalt blue, the name Azure has sometimes been given to it...
George Field 「Field's Chromatography」
...Behind it, are the artificial ultramarines;and behind them again, cobalt and cerulian blue...
George Field 「Field's Chromatography」
...Another Prussian green, with a base of cobalt, is obtained byprecipitating the nitrate of that metal with yellow prussiate of potash...
George Field 「Field's Chromatography」
...True cobalt green is made byigniting a very large quantity of carbonate of zinc with a very smallquantity of carbonate of cobalt...
George Field 「Field's Chromatography」
...A compound analogous to cobalt green may be made, of an olive hue, withmore body, and equally stable...
George Field 「Field's Chromatography」
...Compounds of sepia and yellowochre, gamboge, raw Sienna, or cobalt and aureolin, are severallyuseful...
George Field 「Field's Chromatography」
...There is obtainable from cobalt a very rich marrone brown, which, likemany other colours, is more beautiful while moist than when dried...
George Field 「Field's Chromatography」
...Mixed with French blue or cobalt, lamp black gives good cloudy grays,which are useful for the shadows of heavy storm clouds...
George Field 「Field's Chromatography」
...For like purposes, the black with ultramarine ashaffords a very soft hue, and with light red and cobalt in differentproportions yields silvery tones most serviceable...
George Field 「Field's Chromatography」
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