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Vol.1 , No. 5, Publication Date: Sep. 9, 2015, Page: 221-238
, Manjistha (MJ), Babool (BL), Red Sandal Wood (RSW) and Pomegranate Rind (PGR)] to produce compound shades. This compatibility study was done by conventional plots of ∆C vs ∆L plots and K/S vs ∆L for two sets of progressive shade build up data for each pair of binary mixture of the said natural dyes, where pre-mordanted jute fabric samples were dyed with each pair of dyes taken in equal proportions (50:50). Also another newer method of Relative Compatibility Rating was applied using an empirical index (colour difference index i.e CDI value) as an alternative approach. Different shades of varying colour combinations were developed using binary mixtures of selective natural dyes and their colour strength (K/S value), total colour differences (∆E), ∆L, ∆a and ∆b values, changes in hue (∆H), brightness index (BI) and metamerism index (MI), along with colour different index (CDI) as well as their colour fastness behaviour to wash, light and rubbing have been evaluated and compared. Relative Compatibility Rating (RCR for 0 to 5 grade) for binary mixture of selective pair of natural dyes have also been assessed by analysis of differences of CDI values amongst dyed jute fabrics with different proportion of each pair of natural dyes and calculating RCR value accordingly by the said newer method. The results of this newer system of relative compatibility rating are found to be well in agreement with the results of above said conventional method of test of dye compatibility. Irrespective of proportions used, Catechu + Red sandal wood combination was found to be most compatible (having RCR-3-4). Colour fastness to wash may be improved ½ to 1 grade by treatment with selective cationic dye fixing agents like Cetyl Trimethyl Ammonium Bromide (CTAB) or Cetrimide or commercial Sandofix-HCF. Similarly colour fastness to light is found to be improved ½ to 1 grade by treatment with 1% Benztriazole (an UV- absorber).&picture=http://www.aascit.org/aascit/decorators/img/journal/891.jpg)
| [1] | A. K. Samanta, Department of Jute and Fibre Technology, Institute of Jute Technology, University of Calcutta, Kolkata, India. |
| [2] | Mahadeb Datta, National Jute Board, Ministry of Textiles, Government of India, Kolkata, India. |
| [3] | Siddhartha Datta, Department of Chemical Engineering, Jadavpur University, Kolkata, India. |
This paper constitutes extraction and characterization of catechu extracted colour component by UV-VIS spectral scan and studies on different colour interaction parameters and compatibility of different pairs of dyes for dyeing jute fabric with binary mixtures of selective natural dye pair [mixtures of catechu with Tesu (TESU), Manjistha (MJ), Babool (BL), Red Sandal Wood (RSW) and Pomegranate Rind (PGR)] to produce compound shades. This compatibility study was done by conventional plots of ∆C vs ∆L plots and K/S vs ∆L for two sets of progressive shade build up data for each pair of binary mixture of the said natural dyes, where pre-mordanted jute fabric samples were dyed with each pair of dyes taken in equal proportions (50:50). Also another newer method of Relative Compatibility Rating was applied using an empirical index (colour difference index i.e CDI value) as an alternative approach. Different shades of varying colour combinations were developed using binary mixtures of selective natural dyes and their colour strength (K/S value), total colour differences (∆E), ∆L, ∆a and ∆b values, changes in hue (∆H), brightness index (BI) and metamerism index (MI), along with colour different index (CDI) as well as their colour fastness behaviour to wash, light and rubbing have been evaluated and compared. Relative Compatibility Rating (RCR for 0 to 5 grade) for binary mixture of selective pair of natural dyes have also been assessed by analysis of differences of CDI values amongst dyed jute fabrics with different proportion of each pair of natural dyes and calculating RCR value accordingly by the said newer method. The results of this newer system of relative compatibility rating are found to be well in agreement with the results of above said conventional method of test of dye compatibility. Irrespective of proportions used, Catechu + Red sandal wood combination was found to be most compatible (having RCR-3-4). Colour fastness to wash may be improved ½ to 1 grade by treatment with selective cationic dye fixing agents like Cetyl Trimethyl Ammonium Bromide (CTAB) or Cetrimide or commercial Sandofix-HCF. Similarly colour fastness to light is found to be improved ½ to 1 grade by treatment with 1% Benztriazole (an UV- absorber).
Keywords
Colour Interaction Parameters, Compatibility, Relative Compatibility Rating, Colour Difference Index, Binary Mixture, Cetyl Trimethyl Ammonium Bromide (CTAB)
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