PigmentsNoteswoct#5

PigmentsNoteswoct#5 - iron oxides PIGMENT Insoluble in...

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1 ARTISTS' PIGMENTS PIGMENT Insoluble in Medium DYE Soluble in Medium Murex sea snail iron oxides manganese oxide COCHINEAL RED COCHINEAL RED (Dye) Alum KAl(SO 4 ) 2 CARMIN RED (Pigment) A dye can be converted into a pigment by treatment with metallic salts (i.e. alum). It is then called a lake Portrait de Matisse André Derain ca. 1905 Carmin Red INORGANIC ORGANIC Cochineal Red iron oxides manganese oxide
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2 ULTRAMARINE (Lapis Lazuli) sodium aluminum silicate sulfate AZURITE 2CuCO 3 ±Cu(OH) 2 Azurite Ultramarine MALACHITE CuCO 3 ±Cu(OH) 2 AZURITE 2CuCO 3 ±Cu(OH) 2 Synthetic Natural INORGANIC Synthetic Natural ORGANIC Prussian Blue Fe(NH 4 )Fe(CN) 6 ca. 1700 1st Synthetic Modern Inorganic Colorant
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3 EGYPTIAN BLUE Calcium Copper Silicate 3000 B.C . Natural Synthetic ULTRAMARINE PIGMENT Opacity Toxicity Chemical stability Bleeding stability Oil Absorption Light fastness OPACITY Particle size Refractive Index OPACITY Particle size Refractive Index
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4 Size Opacity Size Colour OPACITY Particle size Refractive Index 2.55
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PigmentsNoteswoct#5 - iron oxides PIGMENT Insoluble in...

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