CHAPTER XXIV. THE MANUFACTURE OF ULTRAMARINE 211 Preparation of Mixtures for Ultramarine—Ultramarine Violet—Chlorine and Steam Process—Hydrochloric Acid and Air Process—Ammonium Chloride Process —Pale Blue Ultramarine—Ultramarine Red. CHAPTER XXV. BLUE COPPER PIGMENTS 226 Bremen Blue and Green—Neuberg Blue—Lime Blue —Payen’s Mountain Blue—Oil Blue—Copper Hydroxide. CHAPTER XXVI. BLUE COBALT PIGMENTS 230 Cobalt Blue, Thénard’s Blue, Cobalt Ultramarine, King’s Blue, Leyden Blue—Cæruleum—Cobalt Zinc Phosphate. CHAPTER XXVII. SMALTS 233 Preparation of the Charge—Fusion of the Charge —Grinding the Fused Mass—Tungsten Blue —Tessié du Motay’s Blue—Molybdenum Blue. CHAPTER XXVIII. GREEN MINERAL PIGMENTS—GREEN COPPER PIGMENTS 240 Green Copper Pigments: Copper Carbonate—Copper Arsenite —Scheele’s Green—Swedish Green—Brunswick Green —Green Verditer—Neuwied Green—Copper Oxychloride. CHAPTER XXIX. EMERALD GREEN 244 Manufacture of Emerald Green from Verdigris—Manufacture of Emerald Green from Copper Sulphate—Mitis Green or Vienna Green—Copper Stannate—Kuhlmann’s Green—Elsner’s Green—Casselmann’s Green—Lime Green—Patent Green—Copper Borate—Copper Silicate (Egyptian Blue). CHAPTER XXX. VERDIGRIS 252 Blue Verdigris—Distilled or Crystallised Verdigris —German Verdigris. CHAPTER XXXI. CHROMIUM OXIDE 260 Chrome Green. CHAPTER XXXII. OTHER GREEN CHROMIUM PIGMENTS 264 Guignet’s Green—Emerald Green—Chrome Green Lake —Turkish Green—Leaf Green.—Chromium Phosphate Pigments: Arnaudan’s Green—Plessy’s Green —Schnitzer’s Green—Chromaventurine—Chrome Blue (Garnier). CHAPTER XXXIII. GREEN COBALT PIGMENTS 268 Cobalt Green. CHAPTER XXXIV. GREEN MANGANESE PIGMENTS 270 Manganese Green—Rosenstiehl’s Green—Böttger’s Barium Green—Manganous Oxide—Manganese Blue. CHAPTER XXXV. COMPOUNDED GREEN PIGMENTS 273 Chrome Green—Elsner’s Chrome Green—Silk Green —Natural Green—Non-arsenical Green. CHAPTER XXXVI. VIOLET MINERAL PIGMENTS 276 Chromic Chloride—Manganese Violet—Tin Violet, Mineral Lake—Copper Violet, Guyard’s Violet.