The dyeing behaviour of an experimental nylon 4.6 fibre towards typical commercial nonmetallised acid and 2:1 premetallized acid dyes was investigated, rn terms of dyebath exhaustion, build-up and wash fastness, the results obtained imply that the experimental fibre behaved in a manner that was to be expected of its conventional nylon 6 and 6.6 counterparts; however, the light fastness of 1/1 standard depth dyeings on the experimental fibre was found to be higher than is typically encountered for such dyes on conventional polyamide fibres.
