Abstract:

This paper presents an investigation consisting of several stages of sample treatment and testing. The first stage was dyeing cotton yarns (with nominal counts of 20 tex and 30 tex) using reactive dyes to obtain yarns in six different colours. Differences in physical and mechanical properties between yarns of different colours were then investigated. In the second treatment stage all samples were sized using two processes: the standard sizing process and pre-wetting sizing process, with two different size concentrations, with the aim to investigate the influence of the sizing process on multi-coloured warp. Also the influence of dyeing on size bonding to the yarn were investigated, as well as on physical-mechanical properties of sized yarns, which are of paramount importance for the further process of making a woven fabric.