In this research, an experiment was carried out to standardize the suitable mordant for Terminalia catappa L leaf (Red and Yellow) dye for an alternate textile dyeing. The dye was extracted through aqueous methods with addition of different mordant. From the research the different colour was noticed from different mordants. Results suggested that pre mordanting dyeing method with heating improves dyeing abilities in Cotton, Wool and Silk fabrics. This has been done to test the quality of dyeing in Cotton, Silk and Wool.