I did a little research, and denim jeans are one clothing item usually made with indigo dye. Indigo is an organic dye, and salt will help set it. Jeans are often over-saturated with dye, so they often crock. The idea of over-saturation is to allow creases, etc. that get a larger amount of rubbing to fade more than other areas of the jeans. Here is some more info on denim:
http://www.ehow.com/how_6149578_set-...ye-fabric.html

No, but I heard of it.

thanks learning more here. I will have to do that with the jeans. I know we always washed our panty hose out in salt water or the knee highs cause it made them last longer. I haven't thought of that in years as I don't need to wear them anymore.

I do, too and add a little white vinegar to it.

I use salt and vinegar also. Learned this from hunters...sets the camo pattern AND eliminates odor which the animals can smell.

I wash my quilts in a machine rinse/cold water with salt if they get any stains on them, they come out perfect even if the stain, even blood, has dried in!

Wonderful to know, how much salt to a tub or half tub?

also good to know, how much salt and vinegar? thank you

About half handful I find about right.

Thank you, looks like a good tablespoon, lol