Effects of warp-weft density variation and fabric porosity of the cotton fabrics on their colour in reactive dyeing

One of the main problems in dyehouses is caused by the differences between the structural parameters of the reference fabric of which the dyeing recipe is known and the fabric to be dyed. In such a case, knowledge of the effects of the parameters such as warp and weft density and fabric porosity on the colour efficiency is of great importance for 'right first-time' dyeing. Cotton fabrics with different warp & weft densities and porosities were dyed with reactive dyes, and the colour measurements were carried out with a spectral photometer. Warp & weft densities and porosity do not have any evident effect on the colour shade, although a considerable change in colour yield was determined.