Dyeing of silk fabric with natural dye from camphor (Cinnamomum camphora) plant leaf extract

Abstract

Natural dye extracted from the leaves of camphor (Cinnamomum camphora) was applied to silk fabric, with and without metallic salt mordants, using the exhaust dyeing method. Three techniques, meta‐mordanting, post‐mordanting and pre‐mordanting, were employed, using potash alum, ferrous sulphate and zinc sulphate as mordants. Dyed silk fabric was analysed for K/S, CIE L*a*b* values, and colourfastness performance to washing, light and crocking. Optimal results were obtained for dyeing at 90 °C for 60 min at pH 4. A yellowish shade was observed when silk fabric was dyed without mordants, and a variety of pale to dark reddish colour shades were achieved with the trio of mordants; ferrous sulphate produced the dullest and darkest shades. Colourfastness to washing was fair to good, colourfastness to light was poor to fair, and colourfastness to crocking was good to excellent.

Natural colorant extraction from Cinnamomum camphora tree leaves of different maturities and its ultrasonic‐assisted extraction process

“…Some types of beverages, such as colourless juice beverage and white wine, were found to have an increased colour attractiveness after adding colorants from camphor leaves extracted with ethanol and white vinegar. Since then a number of investigations have been conducted in the area of textile dyeing . However, in these studies, only green young leaves or old fallen leaves were used in the colorant extraction, and sodium hydroxide (caustic soda) was mainly used as the extracting solvent.…”

“…Since then a number of investigations have been conducted in the area of textile dyeing. [4][5][6][7][8] However, in these studies, | 313 GONG et al…”

Dyeing mechanism and photodegradation kinetics of gardenia yellow natural colorant

“…1–6 Scientists working in the field of natural colorant technology are now focusing on improving the extraction of colorants from plant materials and their application onto fabrics. 7–11 Preference of natural colorants over synthetic counterparts is due to environment friendly processing, increased sustainability, renewable resources, reduced pollution, and green chemistry, amongst others. 12–16 Gardenia yellow is a natural dye that has been widely utilized for dyeing purposes due to its elegant color and exceptional performance.…”

Extraction of natural dyes from the stem of Caulis spatholobi and their application on wool

“…1–5 However, some synthetic dyes contain heavy metals and azo groups, which are harmful to the environment and human health. 6–8 Also, the dyeing and printing wastewater usually contains high salt dosages, residual dyes and chemical auxiliaries, which may cause serious health issues and disturb the ecological balance. 3,9 Therefore, most dyestuff and auxiliaries manufacturers nowadays set up factories in the countryside and suburbs where the environmental law is weak.…”