pigmented colorants: dependence on media and time - Cornell ...

Table 5.2: Relevant data regarding pigments used in research. Adapted from [Pig05].
Mineral name Origin Density ( g
cm3 ) Hardness (Mohs) Refractive index ASTM ratinga Lapis lazurite Cordillera, Chile 2.38 − 2.9 5.6 1.50 I/I/I
Cold glauconite Baltic states, Europe 2.2 − 2.9 2.0 − 3.0 1.551 − 1.569 I/I/n.r.
Chrome yellow (not specified) b 2.9 − 4.3 4.0 − 5.5 2.260 − 2.398 I/I/I
Gold ochre Voronezhskaya, Russia 2.9 − 4.3 4.0 − 5.5 2.260 − 2.398 I/I/I
Raw umber Khot’kovskaia, Russia 3.3 − 4.3 5.0 − 5.5 2.260 − 2.398 I/I/I
Burnt sienna Luberon, France 3.3 − 4.3 5.0 − 5.5 2.260 − 2.398 I/I/I
Red ochre Izyumskyy, Ukraine 2.9 − 4.3 4.0 − 5.5 2.260 − 2.398 I/I/I
Hematite Kerch, Russia 5.27 5.0 − 6.0 2.78 − 3.01 n.r./I/I
Cold hematite Novgorod, Russia 5.27 5.0 − 6.0 2.78 − 3.01 n.r./I/I
Lampblack (not specified) 1.77 (not specified) 2.42 I/I/I
Titanium dioxide (not specified) c 4.00 (not specified) 2.72 I/I/I
a The ASTM lightfastness rating is given for the binders (acrylic/oil/watercolor), unless not rated (n.r.)
b Natural yellow oxide comes from South Africa, India, France, Russia and the United States.
c Titanium Dioxide is processed in both the United States and Norway.
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