Japanese for "Wood-grained metal", Mokume Gane is an ancient technique using contrasting metals to achieve a wood like pattern.
We learned this process from a very talented jeweler named Steve Midget. For people interested in learning this technique he has published 2 books on this subject that take you from start to finish.
First we clean everything!!
Some of the raw material. We start with 22 gauge sheets 1.5" x 1.5". We clean them extremely well, and stack them in the order we want.
Then we weld them while under pressure.
Next we use a lot of pressure and heat to bond the metals together without solder. The kiln we carve out of two kiln bricks. We have a C-clamp, modified by Zeigler's welding, providing the pressure during the firing. The C-clamp and stacked metals are enclosed in the brick kiln. We then use two torches to set up a convection type firing. This is a dangerous time; too much heat and it all melts to slag, to little and it won't make a good diffusion bond.
Close up of the metals during firing.
After that we clean up the edges of what is now called the laminate or billet.
Then we cut rectangular cross sections like seen here.
Using several different techniques we twist and forge them into rings, pins, pendants, or anything else.