Investigation of the Effect of Turkey Red Oil on Colour, Fastness Properties and HPLC-DAD Analysis of Silk Fabrics Dyed with Madder (Rubia Tinctorium L.) and Gall Oak
Madder (Rubia tinctorum L.) has been used for dyeing textile materials since the stone age. This plant contains natural pigments in its roots, such as alizarin, pseudopurpurin, purpurin, munjistin, rubiadin, xanthopurpurin, purpuroxanthin, lucidin, chinizarin, christofin and anthragallol. Madder gives a unique red colour to textiles. The aim of this study is to understand the effect of Turkey red oil on silk dyeing by using madder (Rubia tinctorıum L.) and gall oak extracts (Quercus infectoria Olivier). Alum [KAl(SO4)2.12H2O] and Ca(NO3)2.4H20 were used as mordant. Mordanting was achieved at 650C for 120 min, at pH 4-5 with flotte ratio 100:1. The dyeing process was carried out a at 650C for 60 min. at pH 6-7 with flotte ratio of 100:1. The colour coordinates K/S, as well as washing, light and rubbing fastness values were determined and discussed. Reversed-phase high-performance liquid chromatography with diode-array detection was utilized for the identification of colouring compounds present in the dyed silk fabrics. The effects on the results of gall oak, madder and Turkey red oil was evaluated.