yea, using vinegar on jeans will help set the color. You could add it to your washing machine, or fill a tub with water, and add some vinegar. i have done this many times in the past, and every time I am happy with the result
Yes, vinegar on jeans will help set the color. You should fill a tub with water and just put a generous amount of vinegar in as well. With the tub filled you should soak your jeans for about 20 minutes and if you want to soak any longer change the water. Hope it helps!