I AM TRYING TO DYE BLUE COTTON/POLYESTER SCRUBS TO BLACK AND THE COLOR IS NOT TAKING, I HAVE SOAKED THEM IN VINEGAR AND HAVE DONE THE SALT IN THE WATER AND LET THEM SOAK FOR OVER 5 HOURS AND THE COLOR WILL NOT TURN BLACK, WHAT WOULD YOU SUGGEST? BETTY

betty,
please read my article on Fabric Dyeing 101 (at the top of the DizzyLettuce column at fabrics.net). This will explain your dilemma.
1. Polyester will not take dye at all.
2. Black is a hard color to get in best of circumstances.
3. Rit is not a dark, saturated dye.
4. Good news is that all cotton, ready-to-dye scrubs are available at www.dharmatrading.com.
best,
Jennifer