Description
The CORIARIA (or redoul) EXTRACT from OCCITANIA is manufactured from local raw materials of organic collection. This 100% natural dye is obtained from the aerial parts of the plant Coriaria myrtifolia L. It is rich in plant tannins (gallotannins) extracted with water, from sustainable methods. This plant was widely used by dyers of the XVIIIth Century (Paul Gout, Antoine Janot…) and described in their historical recipes.
EXTRACT PRODUCED IN EXCLUSIVITY AND LIMITED QUANTITY
Main components : hydrolyzable tannins (around 15 %) + flavonoïds (quercetin and kaempferol glycosides).
Uses : Natural dyeing and textile printing : this plant extract allows to dye any type of fibers, mordanted or not. The tannins of gallic type (tannic acid = hydrolyzable tannins) naturally bind to cellulosic fibers. The shades are obtained depending on the concentration of bath and mordant : beige, fawn (not mordanted or aluminium), greys in presence of iron, orange in presence of titanium. This plant was part of the recipe of Noir de Bédarieux, our city. It was also used and described in the recipes of Paul Gout’s 157 colours.
Other uses : Tannery.
The plant : Coriaria or Redoul (litterally ‘myrtle-leaved corroyere’, Coriaria myrtifolia L.) is a common species in the South of France and Catalonia. This shrub which has leaves similar to myrtle and can be 2-3 m height, is present along paths and rivers. WARNING: the fruits of this plant are very toxic and can sometimes be confused with brambleberries. The literature also indicates that the aerial parts are toxic. We have carried out research and analyzes which show that the most toxic parts are the seeds (the fruit pulp is much less so). Our extract is made from material without any fruit, using an optimized extraction process and our analyzes demonstrate that toxic molecules are only detected in trace amounts in the extract.
Historical uses and Noir de Bedarieux Redoul or coriaria has been known and used since the Middle Ages in the South of France and in Catalonia. Narbonne and Montpellier were by far the largest importing centers for Catalan corroyère in Languedoc. During the first half of the 14th century, the city of Montpellier, the main center of demand, was gradually overtaken by Narbonne. Its name comes from the Latin corium or corroyage, indicating its use for tanning hides, its first use. Redoul is the basis of one of the technical innovations of the Languedoc and Catalan cloth dyers of the Middle Ages: it made it possible to obtain a beautiful black by giving a second dye with tannins and iron salts to a sheet which had already received a “foot” of pastel which could, in this case, be significantly less intense. Closer to us, books on the chemistry of dyes from the 19th century describe the production of Noir de Bedarieux, of which redoul is the main ingredient. GREEN’ING being located very close to Bédarieux, it was obvious for us to revive this color.
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