International Science Community Association Research Journal of Chemical Sciences 16 2 2026 06 18 Natural dyeing Cotton fabric Mordanted with Alum and Soymilk using Avocado pits, Avocado skins, Straw berry and Madder root – their colour fastness test & FTIR analysis 1 10 EN Gupta Swaroopa Rani N. 1 Department of Chemistry, Brijlal Biyani Science College, Amravati, Maharashtra India > Research Paper 2025 9 11 2026 06 18 The avocado (Persea americana) is a medium-sized, evergreen tree in the laurel family (Lauraceae). Raw avocado flesh is 73% water, 15% fat, 9% carbohydrates, and 2% protein. Polyphenol compounds, such as tannins and flavonoids, are natural color sources found in avocado seeds. The garden strawberry is a widely grown hybrid species of the genus Fragaria, collectively known as the strawberries, which are cultivated worldwide for their fruit. The fruit is widely appreciated for its characteristic aroma, bright red color, juicy texture, and sweetness. Raw strawberries are 91% water, 8% carbohydrates, 1% protein, and contain negligible fat. Purple minor pigments consisting of dimeric anthocyanins (flavanol-anthocyanin adducts: catechin(4α→8) pelargonidin 3-O-β-glucopyranoside, epicatechin(4α→8) pelargonidin 3-O-β-glucopyranoside, afzelechin (4α→8) pelargonidin 3-O-β-glucopyranoside and epiafzelechin (4α→8) pelargonidin (3-O-β-glucopyranoside) can also be found in strawberries. Rubia is the type genus of the Rubiaceae family of flowering plants, which also contains coffee. It contains around 80 species of perennial scrambling or climbing herbs and subshrubs native to the Old World. The genus and its best-known species are commonly known as madder, e.g. Rubia tinctorum (common madder), Rubia peregrina (wild madder), and Rubia cordifolia (Indian madder).Rubia was an economically important source of a red pigment in many regions of Asia, Europe and Africa. The plant's roots contain an anthracene compound called alizarin that gives its red colour to a textile dye known as Rose madder. It was also used as a colourant, especially for paint, that is referred to as Madder lake. Present paper deals with natural dyeing cotton fabric mordanted with Alum and Soymilk using avocado pits, avocado skins, straw berry and madder root. This also includes their Colour Fastness test for Water Fastness and Light Fastness and FTIR analysis. Copyright@ International Science Community Association