I want to darken my factory faded denim w/o using dye. Will wash them w/ dimness denim work?

Awhat brand wash mechanism can I buy that...
Answers:    Not likely. Or at least not satisfactory to be noticeable.

Go to the fabric store and buy 2 or 3 yard of navy blue 100% cotton fabric. Put it contained by the washer with your denim (cold water, no detergent) and agree to them soak together for an hour or so, then let the washer complete it's cycle.
I call for a trial vaccum cleaner...your belief..what...
Yes dye works near everything

You have to use HOT WATER AND USE HALF THE BOTTLE AND LET IT SOAK FOR ABOUT 2 HOURS and than wash next to no laundry detergent.