search by
Copyright @ Pol J Cosmetol
Pol J Cosmetol 2018, 21(3): 260-262pl  The influence of iron and copper ions on human hair coloration with henna (Lawsonia inermis)Jacek Arct 1,2/, Katarzyna Pytkowska 1,2/, Kinga Owczarczyk 1/ 1/ Wydział Kosmetologii, Wyższa Szkoła Zawodowa Kosmetyki i Pielęgnacji Zdrowia w Warszawie 2/ Fundacja dr Seidla w Warszawie Summary Introduction. Henna (powdered leaves or extract from Lawsonia inermis) is a popular mean for colouring hair and skin. It is often used as an addition to other colouring agents. It is known that a number of inorganic cations change the effect of colouration. Water used for washing is often contaminated with metal ions that tend to accumulate in the hair. This indicated the possibility of the obtaining different shades depending on degree and type of water pollution. Aim. The aim of the study was to evaluate the effect of iron and copper ions on the colour effects of human hair dyeing with henna. Materials and methods. Human hair of light blonde shade was used, which was soaked in aqueous solutions of 10% iron and copper salts and then coloured with henna. After drying, the colour of the hair was measured using chromameter in the L*a*b* scale. The colour of natural hair before treatment with henna or metal salt solutions was adopted as a reference. Results. Henna on hair treated with metal salts causes a significant decrease in their lightness. Hair treated with iron salts and then henna takes a colour in which the amount of red shade is low. The henna-based colouring of hair previously treated with iron and copper salts significantly reduces the proportion of yellow shade Conclusions. Hair treatment with iron and copper salts has a significant influence on the effects of henna colouring. Significant darkening was observed with a small share of red and a reduction in the yellow colour. It can be expected that water contamination will have a significant impact on the dyeing of hair with henna-containing preparations. The effect of metal ion concentration on henna-based colouration will be the subject of separate studies. Key words: Lawsonia inermis, henna, lawson, hair dyeing, iron salts, copper salts, influence of metals, color change |