Wurrwulf - Thanks, I felt the same way as you, but I bought one just so I could play around with RIT liquid dyes. The first one I dyed was just using coco brown, and I poured in about 3/4 of the bottle, with just a little water to just cover up the knife. I then added some dish soap, and a little salt. I let the knife simmer about 30 min, took it out, rinsed off with hot water. then gave it a mineral oil bath for 15 min.
The second knife I mixed half and half with Scarlet Red and Coco Brown, I had to let it simmer for about an hour, I had to keep checking on it because it was pink, then salmon, then finally started to turn rust red brown. I am not sure why the second one took so long but I love them now, and the bone has taken a great translucent color. I will definitely be buying more to dye in the future. You can see in the pics above which one has more red in it. In the future I might try using just Red and Coco Brown.
Thanks for the Tip.