Extraction of Tea Natural Dye and its Dyeing Properties on Cotton Fabrics

Natural dyestuffs are evaluated as green sources to color the fabric in the textile industry. In this study, tea natural dye extracted from Longjing tea was applied to dye cotton fabrics by different dyeing processes. The extraction process was investigated thoroughly according to orthogonal experiments to obtain the optimum results. The acid-base stability, storage stability, heat-resistance, and other properties of Longjing tea natural dye were studied. The rubbing fastness, washing fastness and color difference of natural tea dyed cotton fabrics using different dyeing processes were measured. It has been proved that pre-mordant dyeing process and reactive dyeing process are more suitable for Longjing tea natural dye. The rubbing fastness and washing fastness of the dyed cotton fabrics are both very good, fully meeting the dressing requirements.