Since 1862 SCRD creates, manufactures and sells vegetable dyes for worldwide industry. Expertise, R&D and environmental friendliness are the key words for our company and the guarantee of high quality products for all of our customers.
THE DYEING EXTRACTS
Oxydized Logwood extract
Botanical name : Haematoxylum Campechianum
The Logwood tree is small (10 to 15 meters). It has a twisted trunk and a brown-grey bark. The branches are thorny and have very small leaves. The flowers bearing 5 petals, appear in yellow clusters. The wood is very dense and doesn’t float.
Logwood has been used as a dye for centuries..
SCRD has its own Logwood plantation in Southern Nicaragua, since 2005.
Hématéine molecular structure
Logwood has been used for centuries as a natural source of dye, and still remains the best source of Haematoxylin, which is used in histology for staining. In its time, logwood was considered a versatile dye, and was widely used on textiles but also for paper and leather.
Pure Logwood extract dyes water in pink-purple. The dye's colour depends on the mordant used as well as the pH. It is reddish in an acid environment but bluish in an alkaline one.
BOTANICAL FAMILY : Fabaceae
BOTANICAL FAMILY : Haematoxylum brasiletto
OTHER COMMONS NAMES : Red Wood, Brazilwood.
CAUTION : Haematoxylum brasiletto must not be mistaken with Caesalpinia Echinata, also known as Brazilwood : Echinata is an endangered species, which is not at all the case of Brasiletto.
Brasiletto is a small tree (from 2 to 12 meters high) which grows abundantly throughout Central America. It has a twisty trunk and a brown-greyish bark. The branches are thorny and the leaves small. It can be easily confused with Logwood. Flowers are yellow. This dye has been used for centuries.
Through its high Brazilin content, the extract gives a pink to red colour in water and a variety of shades, according to the mordant used. The oxydized form of Brazilin is Brazilein.
Braziléine molecule (= Bréziline oxydized)
Pure Yellow Fustic extract
BOTANICAL FAMILY : Moraceae
BOTANICAL NAME : Morus Tinctoria or Maclura Tinctoria
COMMON NAMES : Yellow Fustic, Old Fustic, Dyer’s Mulberry.
This tree originates in Central America. It is common from Mexico to Argentina.
Yellow Fustic is a big tree with a cylindrical trunk and grey-yellowish bark. The branches are thorny, the leaves fall during the dry season and the small flowers are beige.
OUR PRODUCT : 100 % pure Yellow Fustic extract. The powder colour ranges from deep yellow to brown and has no characteristic smell. The extract is soluble in water and ethanol. With its rich content of Morin and Maclurin, it gives a wide variety of colours, following the ions used.
Molecular structure of Morine
Molecular structure of Maclurine
This dye has been used for centuries, thanks to the great number of shades it gives with various mordants. According to Wikipedia, the main applications of Yellow Fustic, are :
- With bichromate of potash: old gold
- With Logwood and bichromate of potash: greenish yellows
- With Copper sulfate : olive greens
- With ferrous sulfate : dark greens