Thanks again to all for the compliments!
RIT Dye is a clothing dye more than a leather dye. Very old and common stuff here in the US. I grabbed mine at the local Walmart in the laundry detergent section. (Also grabbed a bottle of brown to dye a vest of which I didn't like the camo pattern.)
I used just enough water to cover the knife in the bottom of a saucepan and maybe an ounce or two of dye mixed in with a dash of salt.
So the dye comes in a bottle or packets? Only and oz. or two eh?