How to dye white lace curtains:
Dye white curtains ombre style:
What is the fibre content of the white curtain fabric?
If it is more than 30% synthetic - polyester or nylon, it is suggested that you use dye for synthetic fabrics. If you attempt to use all-purpose dye, the results are likely to be uneven and blotchy.
Buy Dylon for curtains and follow the instructions. Good luck!
I prefer Rit dye and the stove top boiled method. Before I had a self leveling washer, I did it in the washing machine then ran 2 empty loads to clean.