requires 2.65% omf dye [1]. This requirement to use higher amounts of dye on polyamide microfibre coupled with the inherently low/moderate wash fastness properties of acid dyes on nylon results in comparable depth dyeings on microfibre polyamide displaying lower wash fastness than on conventional decitex nylon fibres [1,7,8]. In addition, the larger surface area of microfibre results in a greater rate and extent of dye desorption during
washing and, therefore, reduced levels of wash fastness [8]