Process, Properties, Technology, Patent, Report,
dyes are a class of colorants extracted from vegetative matter and
- There are
many plant materials that can be used for dyeing yarns and materials:
roots, bark, leaves, berries, seeds, twigs, branches, tubers, and nut
hulls, each capable of producing a range of colors with various mordants
- Use of
natural dyes cuts down significantly on the amount of toxic effluent
resulting from the synthetic dye process.
dyes obtained from plants (indigo), those obtained from animals
(cochineal), and those obtained from minerals (ocher).
some fabrics such as silk and wool can be colored simply by being dipped
in the dye, others such as cotton, require a mordant.
dye obtained from plants is madder, which is obtained from the roots of
the madder plant.
plants are dug up, the roots washed and dried and ground into powder.
- The US
and Europe import market supply of natural dyes is dominated by Mexico.
Commercial indigo is sourced from both Mexico and India.
- Most of
the natural dyes produce comparatively dull shades.
cutch, barberry, kamala, tesu and dolu are all primarily sourced from
India, and cochineal and annatto seeds come mainly from Peru.
dyes were used to color clothing or other textiles.
usually used with cream of tartar, which helps evenness and brightens
Iron (or copperas) which saddens or darken colors, bringing out green
usually used with cream of tartar, which blooms or brightens colors,
especially reds, oranges and yellows.
vitriol which saddens colors and brings out greens and Tannic acid used
for tans and browns.
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