Vol. 12, Issue 1 (2023)

Author(s):
Dr. Saradi Jyotsna Gogoi, Dr. Reema Bora, Dr. Nabaneeta Gogoi and Dr. Binita B Kalita

Abstract:
In recent years, natural dyes have gained popularity as a safer alternative to dangerous synthetic colours. Due to the knowledge of potential risks during the creation of synthetic dyes produced through abrasive chemical reactions and the utilisation of petrochemical-based basic ingredients. Such dyes need a lot of energy to produce, and their negative effects on the environment increase pollution. Numerous of these dyes, particularly the azo-based ones, have been discovered to be cancer-causing. Since natural dyes are non-toxic, biodegradable, and secure, the search for eco-friendly dyes is essentially global in scope. In this study, different colours were achieved on Eri silk fabric by combining two different natural dyes namely annatto (Bixa orellana) seeds and tea leaves (Camellia seninsis) in different ratios. Various mordants, including Aluminium potassium sulphate [Alk(SO₄)2. 16 H₂O], copper sulphate (CuSO₄), stannous chloride (SnCl₂), and ferrous sulphate (FeSO₄), as well as mordanting techniques, were used to carry out dyeing in both aqueous and alkali medium. Physical properties like tenacity, elongation, thickness wicking, and stiffness were also evaluated.