Natural Dyeing with Black Carrot: New Source for Newer Shades on Silk

Abstract

Silk dyeing with black carrot or Daucus carota has been attempted for the first time, giving good shades on silk. The colorant responsible for shades of green is primarily anthocyanins, which are more stable over a wider pH range than anthocyanins from other vegetable sources, making it ideal for textile dyeing. Premordanted with metal salts the dyed silk has shown remarkable CIE La * b * values and fastness properties. The K/S of dyed silk swatches increased in the order of reactivity -FeSO 4 > SnCl 2 > SnCl 4 > Alum > CuSO 4 > K 2 Cr 2 O 7 . Black carrot can be a potential dyeing source for natural dyeing.

Environmentally friendly dyeing of wool yarns using of combination of bio‐mordants and natural dyes

“…The highest and lowest K/S values were obtained for FeSO 4 and K 2 Cr 2 O 7 as metal mordant, respectively. 34 Ebrahimi et al 35,36 dyed nylon6 fibers using natural extract from henna, pomegranate and pterocarya leaves. The results illustrated that the mordant improved the dyeing properties.…”

“…The pre‐mordanted process was done using various metal salts on silk fibers. The highest and lowest K/S values were obtained for FeSO 4 and K 2 Cr 2 O 7 as metal mordant, respectively 34 . Ebrahimi et al 35,36 dyed nylon6 fibers using natural extract from henna, pomegranate and pterocarya leaves.…”

Sustainable fashion: eco-friendly dyeing of wool fiber with novel mixtures of biodegradable natural dyes

“…To overcome the inherent drawbacks of natural dyeing on a larger scale, mordants (metallic salts) 16 , 17 such as aluminum potassium sulfate (KAl(SO 4 ) 2 ), stannous chloride (SnCl 2 ), potassium dichromate (K 2 Cr 2 O 7 ), and sodium chromate (Na 2 CrO 4 ) are extensively added in dyeing by pre, simultaneous, or post-mordanting pattern 18 , 19 to form complexes between the natural dye and fiber. After complexation, the natural dye is stably precipitated in fiber 20 , promoting dye exhaustion, fixation, and colorfastness to washing and rubbing 21 – 23 .…”

Sustainable Dyeing of Cotton Fabric Using Black Carrot (Daucus carota L.) Plant Residue as a Source of Natural Colorant

“…Carrots are a rich source of different active photochemicals such as phenolics, flavonoids, carotenoids, chlorophylls and anthocyanins [22][23]. The darker color of black carrot is due to the presence of anthocyanin [24][25], which are mainly distributed among flowers, fruits and vegetative parts and impart bright colors such as purple, red and blue to these plant organs [26][27]. These have antioxidant [28], anti-fungal, anti-bacterial and anti-cancerous properties [29], and are widely used in food, drugs and in pharmaceutical products [30].…”