High‐temperature and high‐pressure dyeing of polyester fabric with sappan wood extract: Colour characteristics and <scp>ultraviolet</scp> resistance

Abstract Although sappan wood extract is an important natural red dye, the research for its application on polyester fibres is relatively limited. We endeavoured to utilise sappan wood extract for the dyeing of polyester, with the aim of creating an eco‐friendly fabric with a natural colour and ultraviolet (UV) resistance. In this study, the polyester was dyed with sappan wood extract, and the fabric's CIELab colour characteristic values, Integ value were investigated closely. The depth of shade observed in the sample is influenced by various factors, including pH, temperature, and time, among others. It is worth noting that variations in pH, temperature, and salinity can influence the coloration of the fabric. Our research indicates that polyester fabric dyed with sappan wood extract exhibits favourable UV resistance and colour properties.