Dyeing of wool with onion skin as a natural dye by using ultrasonic technique

The dyeing of wool fabrics using onion skin has been studied in both conventional and ultrasonictechniques. The results of dye extraction indicate that power ultrasonic is rather effective thanconventional heating at low temperature and short time. The effects of dye bath pH, saltconcentration, ultrasonic power, dyeing time and temperature were studied and the resulting shadeobtained by dyeing with ultrasonic and conventional techniques were compared.Color strength values obtained were found to be higher with ultrasonic than with conventionalheating. The results of fastness properties of the dyed fabrics were fain too good.

کلیدواژه ها:

Ultrasound ، Dyeing ، Wool ، Natural dye ، Onion skin