Method of extraction onion dye and its application


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Method of extraction onion dye and its application

  1. 1. Today’s presentation will be about…. Methodof ExtractionOnionDye and its Applications in Textile Danish Raja
  2. 2. CONTENTS:  Introduction about dye .  Introduction of natural dye.  What is onion dye?  Structure of ONION dye . Extraction of onion dye. Reciepe . Application of onion dye in textile. Result .
  3. 3. INTRODUCTION ABOUT DYES There are two types of Dyes. 1) Natural Dyes. 2) Synthetic Dyes.
  4. 4. Introduction of Natural Dye 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.
  5. 5. Introduction of Onion Dye 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 for demonstrating microscope usage. Onion skins can also be used as
  6. 6. Structure of Onion Dye  The dyestuff present in onion skin is called Pelargonidin (3,5,7,4tetrahydroxyantocyanidol).  The structure of Pelargonidin is given below:
  7. 7. Extraction of Onion Dye There are various methods of extraction of onion:  Red Onion Skins  Yellow Onion Skins  White Onion Skins
  8. 8. 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
  9. 9. 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-
  10. 10. The Recipe 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 dyepot .  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.
  11. 11. Applications of Onion Dye i have choose red onion dye for dyeing the cotton material by shibori technique.
  12. 12. Supplies: -Washed cotton fabric -Rubber bands -Red Onion Skins -2 large pots
  13. 13. Step 1: Make Dye -Place your onion skins in a large pot.
  14. 14. Cover the onion skin with water
  15. 15. -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.
  16. 16. 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.
  17. 17. 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.
  18. 18. Step 3: Dye your fabric
  19. 19. -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.
  20. 20. 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.
  21. 21. RESULT;
  22. 22.