Dyeing properties of avocado (Persea americana Mill.) seeds
1995
Tayag, L.C.
The scientific study on the seeds of Persea americana Mill, Family Lauracea, Genus Persea plumier, locally known as avocado was conducted to determine its dyeing properties. Different solvents were tested in the extraction of the dye. The extracted dye was applied to fabric materials. Extraction of dye using different solvents showed that distilled water and sodium hydroxide are the best solvents in the extraction of dye from avocado seeds. Distilled water and sodium hydroxide extracts exhibited satisfactory results in terms of darkness in color of the extracts and their solubility in water. The average results of the three trials in each solvent on the determination of the concentration of dye materials are the following: for distilled water as solvent the concentration was 1.95 percent, for acetic acid extraction the concentration was 1.47 percent, for sodium hydroxide was 4.93 percent and for alcohol extraction the concentration was 1.39 percent. A precipitate obtained from the extract using distilled water as solvent was treated with ferric chloride test solution. A blue color was obtained which means that tannin is present in avocado seeds. Dyeing of mordanted and unmordanted fabric materials showed that the unmordanted cotton fabric have more affinity in distilled water extract as compared to the silk yarns and abaca fiber. The abaca fiber satisfactorily absorbed the dye extract with sodium hydroxide as solvent even without the aid of mordants. The extracted dye using sodium hydroxide as solvent produced a darker color shade when applied with mordanted fabric materials. Out of the five solvent used, it was found out that the best solvent that extracted the dry was sodium hydroxide
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