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Plant
Pigments and Dyes
There
is a slight difference between plant pigments and mineral and
earth pigments. Plant pigments are dyes. That is, they are manufactured
from parts of plants or from plant resins. Dyes are dissolved
into the binder, whereas pigments are actually suspended in the
binder. Plant dyes, also known as lakes, are not as permanent
as other pigments. They are mainly used in coloring fabrics.
Plant resins can be used to color clear varnishes.
Dragons
blood,
also know as Cinnabar, is a powdered form of a ruby red
resin. It is often used to color varnishes.
Gamboge is a
yellow resin with a transparent color which fades in bright light.
Sanderswood
chips
are derived from the sandalwood tree. It can produce colors ranging
from yellow-red to deep crimson depending on the acidity of the
mordant.
Fustic
chips
come from a small tropical tree and creates a dye yellow in color.
Barberry
bark
when boiled in water creates a good, strong and fairly permanent
yellow stain.
Logwood
chips
are used to dye cloth and also create a red wood stain. It is
made from the inner core of a tree originally found in South
and Central America.
Charcoal is made
from charred willow and beech tree twigs.
Indigo is obtained
from the tinctoria plant. It produces a deep violet-blue dye
which is mainly used to color fabrics. The leaves of the plant
are soaked in water until they ferment. On drying, the extract
turns indigo, which is then washed, boiled and dried.
Tumeric is extracted
from the root of a spice plant. It produces a fairly permanent,
strong yellow color used in varnishes, oils, and wax, as well
as a dye.
Indian
yellow
is made from the urine of cows fed on mango leaves.
Madder can be
found in root or powder form and is one of the best red plant
dyes. Madder Red (warm crimson) and Rose Madder (intense pink)
are not very permanent.
Alkanet is a
plant which can be used to create a good red oil for rubbing
discolored mahogany or rosewood. |