Diffusion of dyes in natural fibres

Brady, P.R.

doi:10.1111/j.1478-4408.1992.tb00090.x

Cited by 62 publications

(28 citation statements)

References 140 publications

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“…For the case of demipermanent and permanent hair dyes (oxidation dyes), the shade is formed by interactions between colour precursors and an oxidizing agent and the diffusion of the molecules into the cortex. The diffusion pathways followed by the molecules while they penetrate into the hair fibre have been discussed in several studies [3,4]. On the other hand, temporary and semipermanent hair dyes consist of coloured molecules that can be deposited in the cuticles (temporary) or some might penetrate into the cortex (semipermanent).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-enhanced hair dye application for natural dyeing formulations

Gonzalez

Wood

Lee

et al. 2019

Ultrasonics Sonochemistry

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Advances made in recent years have allowed the application of colorants obtained from natural sources into textile dyeing. The use of ultrasound in the dyeing method is reported to increase dye uptake and decrease dyeing times. The aim of this work is to further extend the knowledge of natural hair dyes considering the use of ultrasound in the dyeing method with commercially available herbal dyes and using goat hair as a model for human hair. Optimal ultrasonic parameters were selected by considering the effects of sonication times (5, 10 and 15 min), frequencies (44, 400 and 1000 kHz) and total dyeing times (30, 60 and 120 min) in the morphology of the dyed hair and the colour intensity. Damage to the hair surface was evaluated by scanning electron microscopy (SEM) images, differences in colour of the dyed hair was obtained by ImageJ analysis and quantification of dye uptake was determined by UV-visible spectroscopy. The evidence from this study suggests an increase in goat hair coloration with the use of ultrasonic energy. Optimal dyeing conditions in consideration of colouration efficacy without hair damage were identified as sonication at 400 kHz for 10 min with a total dyeing time of 60 min.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-enhanced hair dye application for natural dyeing formulations

Gonzalez

Wood

Lee

et al. 2019

Ultrasonics Sonochemistry

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“…Relatively to the outer layer, the amount of Basic Yellow 57 shows an increase until the 6 h before resulting constant. This could be due to the fast saturation time of the reactive sites present on the hair surface because of ionic interaction that these dyes could give with the same fibre [17]. On the contrary, HC Red 3, as expected from the absence of charge and its molecular weigh, shows a very low adsorbed amount on surface (two orders of magnitude less).…”

Section: Dyestuff Time Effectmentioning

confidence: 93%

Study of dyeing properties of semipermanent dyestuffs for hair

Ballarin

Galli

Morigi³

2007

Intern J of Cosmetic Sci

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In this article we have evaluated some of the factors (pH, solvent composition and dye structure) that influence the dyeing of hair with dyes from direct semipermanent categories. These dyes, in fact, have been used more and more in cosmetic industry over the last years, due to their lesser aggressiveness vs. hair fibres. Two different dye classes are investigated: phenylene diamine (HC), well known for their low molecular weight and their small size, and a series of Basic dyes, characterized by the same ionic charge (positive) but with different sizes and different polar groups in the molecule. pH and dyebath composition result critical factors controlling the diffusion and adsorption process.

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“…The diffusion coefficients (D) were expressed by Fick¢s Laws [15]. Complete solution of Fick's equations present considerable computational problems because of the number of variables involved.…”

Section: Diffusion Coefficientmentioning

confidence: 99%

Colour of flax fibres in regard to different pretreatment and dyeing processes

Fakin

Ojstršek

2008

Coloration Technology

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The main objective of this work was to compare the colour of different pretreated (alkaline, acidic and enzymatic) and dyed (conventional and ultrasonic‐assisted) flax fibres, to establish the impact of various parameters on dyeing kinetics. Flax fibres were dyed using two direct dyes of different chemical structures and molecular mass. Diffusion profiles were established by the application of Fick’s Law and dyeing behaviour was studied by means of online spectrophotometry. Finally, the dyed samples were colorimetrically evaluated and colour differences and colour strengths were subsequently calculated. The results provided evidence that a dye molecule’s size has a greater influence on the exhaustion degree, migration and diffusion than individual pretreatment processes. The determined diffusion coefficients indicated superior dye mobility and faster diffusion into the fibres when ultrasonic power was used in comparison with conventional process. Nevertheless, the colour depth obtained was found to be low after ultrasonic dyeing using a larger dye molecule, implying part degradation of CI Direct Red 80 (and total degradation of small‐size dyestuff, CI Direct Red 81).

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Diffusion of dyes in natural fibres

Cited by 62 publications

References 140 publications

Ultrasound-enhanced hair dye application for natural dyeing formulations

Ultrasound-enhanced hair dye application for natural dyeing formulations

Study of dyeing properties of semipermanent dyestuffs for hair

Colour of flax fibres in regard to different pretreatment and dyeing processes

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