Study on the Comparison of the Effects of pH Buffer in Single Stage Preparatory Process with that of Conventional for CVC Woven Fabric

To minimize water and energy consumption, it has become necessary to combine several textile processing stages in order to reduce the number of operations, process time and cost. In this project work an attempt was made to combine the pre-treatment process with optimal quantities of chemicals in single bath by varying different pH with the help of different buffers and comparison was made with conventional process. It has found that buffered system at pH 11 for 60 min shows the best result in respect to wicking test, drop test, immersion test, weight loss%, whiteness index, yellowness index. Then all the pre-treated samples were dyed with reactive dyes by varying the depth of shade. After dyeing it has been found that buffered system at pH 11 for 60 min can be selected for any depth of shades and buffered system at pH 11 for 45 min is suitable for dark shade. This kind of a one-bath process is shorter, consuming less energy and hence being less expensive. The combined processes also lead to substantial saving in water energy and time along with chemicals.