Method of extraction onion dye and its applicationPresentation Transcript
Today’s presentation will be about….
Methodof ExtractionOnionDye and its Applications in Textile
Introduction about dye .
Introduction of natural dye.
What is onion dye?
Structure of ONION dye .
Extraction of onion dye.
Application of onion dye in textile.
There are two types of Dyes.
1) Natural Dyes.
2) Synthetic Dyes.
Introduction of Natural
The word ‘natural dye’ covers all
the dyes derived from the
natural sources like plants,
animal and minerals. Natural
dyes are mostly non-substantive
and must be applied on textiles
by the help of mordants, usually
a metallic salt, having an affinity
for both the colouring matter
and the fibre.
Introduction of Onion
The onion ( Allium cepa)
is also known as the bulb
onion. Onions are often
chopped and used as an
ingredient in various
hearty warm dishes.
Onion tissue is frequently
used in science education
microscope usage. Onion
skins can also be used as
Structure of Onion Dye
The dyestuff present in onion skin is called Pelargonidin
The structure of Pelargonidin is given below:
Extraction of Onion Dye
There are various methods of extraction of onion:
Red Onion Skins
Yellow Onion Skins
White Onion Skins
Red Onion Skins
Red onion skins create a earthy
range of colors. Protein fibers
such as wool and silk, dye a
pale to medium nutmeg brown,
with a mix of rosewood, russet
and rosy browns. Cellulose
fibers such as cotton, hemp, and
bamboo dye a range of seashell
pinks, with a mix of champagne,
pale, and silver pink. Natural dye
colors are living colors, they are
alive with the life that made
them. The dry outer skins of
onions can be used for coloring
natural textile materials. Red
onion skins create a different
range of colors so it's important
to keep your dye
Yellow Onion Skins
Yellow onion skins create a golden range
of earthy colors. With a concentrated dye
bath and enough time for the fibers to
soak, the colors achieved are
a combination of red and yellow, usually
resting in the middle as
an orange. Protein fibers such as wool
and silk, dye deep to medium shades of
ochre, creating pigments in the cadmium-
orange families. Cellulose fibers such as
cotton, hemp, and bamboo dye a range of
dark orange to a lighter orange
peel, having deep notes of golden-
We need Onion skins & water to cover.
Bring the water to a boil and let simmer for an 1 hour.
Remove the onion skins from the pot .
Soaking the dyestuff a few days before is an alternative or aid in
extracting color from dyestuff evenly soak fibers in hot water before
placing them in the dyebath .
Place pre-wet fibers into the dyebath .
Heat dyebath for 1 hour, using a spoon or stick to submerge
fibers and free air bubbles to achieve even color avoid crowding the
Let the fibers cool in the dyebath this will give brighter
results longer is stronger remove the fibers from dyebath, rinse with
cold water until water runs clear hang to dry.
Applications of Onion Dye
Step 1: Make Dye
-Place your onion skins in a large pot.
Cover the onion skin with
-Bring the mixture of water and onion skins to a boil
and simmer for at least 1 hour. This allows for the
color to come out of the onion skins.
Step 2: Shibori Folding Technique
I folded the fabric using a modified version of a basic
shibori technique. Fabric should be scoured prior to
dyeing. If you do not have soda ash to do this,
washing it with a detergent and no fabric softener
should be ok.
Once you have your folded bundle, wrap it tightly with rubber bands. The
tighter it is the less dye will get inside.
Put your folded fabric bundle in a bowl of water and let it soak for at least 10-
15 minutes. This is important as it allows for the dye to be absorbed evenly.
Step 3: Dye your fabric
-Place your fabric bundles in the pot. Heat the
dye bath for at least 1 hour, stirring as needed
to keep the bundles covered with dye.
Let the fabric bundles cool in the dye bath. -Rinse your fabric bundles
under cool water and unfold them. You want to rinse them until the
fabric runs clear.
-Hang to dry, and iron to remove any wrinkles.