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Introducing variations in colour of cotton fabric–reactive dye systems through irradiation with a carbon dioxide laser
Author(s) -
Hung On Na,
Chan Chee Kooi,
Kan ChiWai
Publication year - 2016
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/cote.12195
Subject(s) - dyeing , ultimate tensile strength , scanning electron microscope , carbon dioxide laser , irradiation , materials science , fourier transform infrared spectroscopy , yield (engineering) , laser , composite material , nuclear chemistry , chemistry , optics , physics , laser surgery , nuclear physics
The effect of CO 2 laser treatment before dyeing (LD) and after dyeing (DL) was compared in terms of colour variation. Two reactive dyes, CI Reactive Blue 19 (RB19) and CI Reactive Black 5 (RB5), were used in three concentrations −0.1, 1, and 5% owf. Morphological changes of the fabrics after laser treatment were observed using a scanning electron microscope. Chemical modification of the laser‐treated cotton fabrics was detected using attenuated total reflectance Fourier transform infrared spectroscopy. The difference in colour was evaluated by spectrophotometer; reflectance value, colour yield, CIE L * a * b *, and levelness were determined. The tensile strength of fabrics laser treated before and after dyeing was also measured. The results show that the DL approach has a stronger effect, resembling a fading of colour, yet a higher tensile strength, especially when dye RB5 is used. The LD approach, on the other hand, provides a better colour yield, levelness, and tensile strength when dye RB19 is used.