Here we go - some of my experiments with dyeing bone. RIT Dye, simmering on stovetop. WARNING: Every time I have dyed a knife with CV steel blades, the blades developed a few small pits during the process. I personally will only do it with stainless steel knives from here on out.
So, first, SS Medium Jack in Sunset Winterbottom Bone - was just too much "Circus Tent" and not as much "Sunset" as I was hoping for, so I decided to try for a reddish chestnut. This actually took two tries to get it right. First time I went with a 50-50 mix of RIT Scarlet and RIT Cocoa Brown liquid dyes. Second time I went with a 2:1 Cocoa to Scarlet ratio. So about 15 minutes each time, rinsed and dried between attempts, but on the same day.
Before:
After:
Since the blades were SS, some metal polish after I was done on the blades and backsprings took care of all of the temporary staining. The dye has held up fine. The knife looks the same today as it did when I dyed it in 2013. Note that the darker valleys in the Winterbottom were touched up with a black sharpie (which is also permanent) to get the look that the knife was supposed to have originally. It doesn't wipe off, it absorbs into the bone as well.
This isn't a before and after comparison, but it is two different knives - a 6344 in Red Bone CV and a 63087 in Red Bone CV. Both were about the same color. I dyed the 63087 with a combo of scarlet and a little cocoa brown (colors of RIT dye) to darken it up a little bit. I didn't give it as long in the dye bath. Remember what I said about CV developing pits? This is one of the ones that taught me that lesson.
So - 6344, never dyed (full sunlight - it's not quite this bright cherry red in most light):
63087 dyed for about 10 minutes (cloudy day photo):
You can avoid the pitting issue by opening the blades and keeping them out of the dye - which is easier if you have a single-ended pattern where you can create sort of a jig to suspend it vertically, though you would need more dye and a bigger pot.