Natural hair dye from heartwood of Haematoxylon campechianum (Linn.) plant
Ram Prakash Singh, KK Agarwal, RB Singh
Heartwood of Haematoxylon campechianum (Linn.) yielded natural dyes as propylene glycol and menthol in henna were carried out 8 times of shampoo dyeing. Experimental results showed that the ‘L’ value (colour lightness change) of dyes hair pieces containing 5% and 7 % Haematoxylon campechianum (Linn.) were 32.2% and 30.4% respectively. Addition of 7% Logwood dye extract in hair to coat on 3 groups of hair pieces which showed that there is no significant difference (P>0.005) between ∆E mean value 16.68 ±0.3 of 3 groups of hair pieces after 8 shampoos and ∆E mean value 16.29 ±0.40 of the 7th shampoo. Results showed that the degree of hair colour fading tends to be smorth after 7th shampoo. The ‘L’ mean value 33.35% of 8th shampoo is significantly different from the 56.34 of bleached hair colour, indicating that after 8th shampoos, the hair colour lightness can still fade. The *a* and *b* mean values decrease from 12.96% and 11.58% after 1st shampoo to 3.34% and 7.78% after the 8th shampoo and the hair colour obviously changes from red to brown. This hair dye increases the tensile strength of the bleached hair by 53.68%. The experiments proved that the henna mixed with Haematoxylon campechianum (Linn.) wood dye like propylene glycol and menthol can withstand more than 8 times of shampooing and it can effectively cover white hair and strengthen hair.