With a leftover piece I also made a pendant that you can see in this instructable: Triquetra Pendant
The close-up pictures were taken with a Pentax K10 D and a Tamron AF 90mm f/2.8 SP Di macro lens.
The other pictures, with a Pentax SMC-FA 50mm f/1.4.
Step 1: Materials
In Italy, especially in my region, we prepare a very good sauce with bone marrow. It is called pevarà (sometimes pearà) and it is made of bread, bone marrow, beef broth, butter and a lot of pepper. In fact its name literally means peppered. So that is why I have those big bones lying around.
An important point is the cleaning of the bone. After the cooking the sponge-like part of the bone is full of red bone marrow and that is not good if you want to work with the bone. The best way to clean it is to put it in the dishwasher!
I was surprised, when I first tried this trick, how good it worked. It perfectly cleans every part of the bone and exposes the sponge-like part.
I put also some close-up pictures of the sponge-like part because it is too cool. Our bones have this kind of structure near the ends to make them light but strong.
Oh yeah... And some Brown India Ink.
Step 2: Tools
- Toy vise (I got it when I was a child but I still use it);
- Very old drill;
- Drill bit for wood;
- Drill saw;
- Drill bit to scrape;
- Dremel drill press (this is not necessary but very usefull);
- A selection of Dremel bits;
- A brush.
Step 3: Cutting and Drilling #1
This is what I did:
- I cutted a rectangular piece out of the bone (trying to make the cuts as parallel as possible, otherwise the vise will not hold it well);
- Drilled a little hole with my drill bit.
- Checked if the hole is centered.
- Drilled the whole hole.
- Using the drill saw I cutted away pieces to get a rough round shape.
- Broke the ring...
Step 4: Cutting and Drilling #2
- Cut two parallel cuts till half the bone.
- Drilled the hole.
- Shaped the ring with small cuts while it is still attached to the main bone.
- Let the dog taste the bone with a lick. Just to check the quality of the bone.
Step 5: Shaping
I wanted it to be a wide band ring, a little thick so I could etch it. Unfortunately with the rough cuts I made it too thin on a side.
Step 6: Etching
Then I etched them with a Dremel bit. The side that was to thin was etched kust a little bit, to give the idea.
Step 7: Polishing
Step 8: Coloring
So I decided to add a little bit of brown India ink in the etches.
With a brush I dripped a little bit of ink in the valleys and waited for it to dry, but not completely. Then with a wet cloth I cleaned the hills.
The bone is a little bit porous and absorbs the ink. This was a quick process so I could not take pictures.
I used this tecnique with another ring some years ago and the ink is still there.
Step 9: Done!
Maybe I should have put more efford on the planning of the knots, instead of just drawing a random one.