Search results
Results from the WOW.Com Content Network
Among the primary types of earth pigments include the reddish-brown ochres, siennas, and umbers, which contain various amounts of iron oxides and manganese oxides. [1] [2] Other earth pigments include the green earth pigments or terres vertes, blue earth pigments such as vivianite-based "blue ochre", white earth pigments such as chalk, and ...
Umber is a natural brown pigment extracted from clay containing iron, manganese, and hydroxides. [11] Umber has diverse hues, ranging from yellow-brown to reddish-brown and even green-brown. The color shade varies depending on the proportions of the components. When heated, umber becomes a more intense color and can look almost black.
Ochre is a family of earth pigments, which includes yellow ochre, red ochre, purple ochre, sienna, and umber. The major ingredient of all the ochres is iron(III) oxide-hydroxide, known as limonite, which gives them a yellow colour. A range of other minerals may also be included in the mixture: [5]: 134 Yellow ochre (Goldochre) pigment
The pigment is also known as red earth, red ochre, and terra rossa. On the Color Index International, the pigment is known as PR-102. This version is from the Italian Ferrario 1919 color list. The first recorded use of burnt sienna as a color name in English was in 1853. [19]
Copper pigments. Han purple: BaCuSi 2 O 6. Cobalt pigments. Cobalt violet (PV14): Co 3 (PO 4) 2. Manganese pigments. Manganese violet: NH 4 MnP 2 O 7 (PV16) manganic ammonium pyrophosphate. [2] Gold pigments. Purple of Cassius: Gold nanoparticles suspended in tin dioxide - Au x • SnO 2. Arsenic pigments. London purple As 2 O 3. [3]
Sienna contains less than five percent manganese. The natural sienna earth is a dark yellow ochre color; when roasted it becomes a rich reddish brown called burnt sienna. [20] Mummy brown was a pigment used in oil paints made from ground Egyptian mummies. [21] Caput mortuum is a haematite iron oxide pigment, used in painting. The name is also ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Sapphire (gem corundum of any color except red, especially blue varieties) Sard (a variety of chalcedony/quartz) Satinspar (a variety of gypsum) Selenite (a variety of gypsum) Simetite (a variety of amber) Smoky quartz (a brown or black variety of quartz) Soda niter (synonym of nitratine) Spectrolite (a variety of labradorite) Spessartite ...