A Kiumarsi - Institute for Color Science and Technology (ICST)
R Abu-Mahboub - Textile Department, Islamic Azad University, Postgraduate Faculty, South Branch, Tehran, Iran
S.M Rashedi - Textile Department, Islamic Azad University, Postgraduate Faculty, South Branch, Tehran, Iran
M Parvinzadeh - Textile Department, Islamic Azad University, Shahre Rey Branch, Tehran, Iran

Today, natural colorants are emerging globally due to the fact that are safer and environmentally-friendly. Natural dyes have been employed in dyeing Persian carpet piles for many years. In this study, the dried pistacia Atlantica was used for dyeing wool and silk yarns. The Iranian wool and silk yarn was scoured, mordanted and then dyed with different amounts of dried pistacia Atlantica leaves. Taguchi statistical method was employed to find the effective factors and results of the planned experiments, in order to optimize the dyeing factors. The colorimetric properties of the dyed yarns were evaluated in CIELAB system. Pistacia Atlantica found to have good agronomic potential as a natural dye in Iran. Metal mordants when used in conjunction with pistacia and temperature were found to enhance the dyeability and its fastness properties. Therefore this natural dye has good scope in the commercial dyeing of wool and silk yarns used as Persian carpet piles.

Natural dye, Wool dyeing, Mordant, Pistacia Atlantica, Taguchi