The art of dyeing fabrics using natural resources has been practiced since ancient times. Textiles have been colored with dyes from plant sources, resulting in a wide range of products. Synthetic dyes, known for being carcinogenic, toxic, and causing pollution, are gradually being replaced by natural dyes. Mordants play a crucial role in both fixing the dye to the fabric and intensifying the color. This study aims to investigate the impact of pre-mordanting with two different mordants, copper sulfate and potassium dichromate, on various naturally dyed fabrics. Natural dyes were extracted from the stem of Musa paradsiaca, leaves of Spinancia oleracea, leaves of Brassica oleraceae.var.capitata f, rubra and rhizome of Curcuma longa. Four fabrics were selected cotton, wool, polyester and cotton silk. Absorbance is inversely proportional to the amount of dye ingrained by the fabrics. Results showed that fabrics mordanted with 4% Potassium dichromate had better absorbing capacity than 2% mordanted fabrics and was found as the most influential mordant. From the experiment, it is inferred that effective mordanting can improve the fixation of dyes extracted from natural sources and thus replace the synthetic dyes in the textile industry. This study emphasises the effective use of mordants in natural dyeing process.