Siena (color)

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Burnt sienna
color code: # 8C4139
Siena natural
color code: # E79239

Terra di Siena ( Italian "Earth from Siena"), Italian ocher is a yellow to reddish brown pigment , named after the earth around the city of Siena in Tuscany (Italy).

Links burnt Siena, right natural

The earth color has a typical yellow-brownish color, natural sienna . The water of crystallization is removed from the pigment by heating and it takes on a red-brown color, which is known as burnt sienna .

As a color referred to Siena but less color-rich Rotgelbtöne: Yellow Brauns are ocher , greenish brown Umbra called more reddish brown tones of red iron oxide .

nature

The sienna earth essentially corresponds to ocher , the coloring component is the limonite it contains . However, it is differentiated from ocher by the content of colloidal silica .

use

The pigments can be used in all binders . The real Terra di Siena is characterized by its special transparency and glaze ability , which distinguishes it in watercolor , but especially as the best glaze ocher in wall painting .

Extraction

Monteriggioni near Siena

The extraction of the earth continued in the Siena area until the 1940s. Today the siena earths are mined in other areas of Italy (on Monte Amiata , Sardinia , Sicily ), Corsica and in North America ( Appalachian Mountains ) because the deposits in Siena itself are exhausted. Synthetic production is also possible.

history

Siena, along with other earth colors, was the earliest color pigment that humans used. It can be proven in Stone Age cave paintings , which also documents its durability. It can often be found in the excavated Roman cities around Vesuvius ( Pompei , Herculaneum ).

Individual evidence

  1. ↑ a b color sample according to color shade 660, 661 ( Memento from February 14, 2008 in the Internet Archive ), H. Schmincke & Co. GmbH & Co. KG (August 12, 2006)
  2. ↑ a b Wehlte , Terra di Siena . P. 94f; Burnt Terra di Siena . P. 114f

literature

See also