Blue on black and white

You can get a good dark blue with this process.  I made up a chemical mix of urea and table salt and mixed it with the blue dye.  I just added half a cup of water to 2 tablespoons of dye.

I laid the fabric out on a rack slightly tilted and then covered it with snow.  Then I covered it with plastic and left it overnight.  I rinsed this fabric with warm water (I have a hose with a sprayer in the basement and I just sprayed the water on)  Very little actually rinsed out and the final rinse came out clear.