Mokume-Gane Metal Techniques
Mokume-Gane Metal Techniques with James Binnion
Of all the demonstrations this is the one I wanted to see. I have always been fascinated by this metal working process.
This is a very old technique of fusing various different metals together using pressure and heat.
No solder is used, solderless fusing is required for the metal to be worked. Solder is not strong enough and will break apart during forging.
This method is finally beginning to become better known and used by a wider variety of metal smiths This method was in danger of dying out and is just now being revived.
If you have ever seen a Damascus knife blade or heard of the ancient Samurai swords that were made by working and folding the metal hundreds of times to create layers, this technique is similar.
The main difference is that in this application of the technique, precious metals are used. Gold (of different carats compositions, and color), Platinum, Silver, Copper, Brass, iron, (of all types) and others are used.
In general the precious metals like Gold and Platinum are used together, less precious metals like Brass and Copper are used together.
The metals that are going to be used together are generally cut to similar size first. Then the metals are cleaned and scrubbed very carefully and fitted together.
Note: The metals are usually clamped together under high pressure using a steel clamp with bolts made out of metal that will withstand the oven heat.
Then the clamp and metal are put into a stainless steel bag, made out of thin stainless steel sheet. The bag is filled with charcoal, sealed and heated at whatever temperature is required depending on the metals being fused.
Note: Commercial makers use an atmospherically controlled oven to achieve a reduction burn (no oxygen). But the stainless steel bags work fine for someone that does not have the $40,000 plus it takes for a controlled oven.
Once the metal has been fused together it is time to manipulate it to create patterns.
The block of fused metal (left) is usually milled for various thickness’, depending on the patterns, effects and final use that the metal is going to be used for.
Various stages of milling, annealing, milling, stamping, carving and cutting are applied.
Knowing what technique or action makes what patterns and effects is where the real knowledge and expertise is required.
Once the metal has been textured, incised, or carved, it will be milled and forged.
Then the metal will be annealed, reforged and milled again. It can be stamped, and reworked many times and was.
Different thickness of metals are needed for making different pieces of jewelry or items.
This example is copper and silver, it really is quite pretty together and you can see the metal layers in the stamped and incised areas.
The stamped marks are on the back of this piece of metal.
Once the marks are made in the block of metal and it has been milled… the metal is ground off on the fount side.
The grinding cuts through the various layers that have been stamped into the metal from the back.
Note: As you may have guessed the round type stamps make a bullseye effect.
There are all kinds of ways to form metal. Cutting, soldering, hammering and so on.
But with Mokume, the patterns are in the actual metal sheet, and it is often desirable to form the metal with methods that do not actually change the patterns and layers of colored metal that you have worked so hard to achieve.
Left – One good way to form the metal is with an hydraulic press.
As you can see the patterns in the Mokume metal were not altered during the forming. Forming makes a very nice clean shape, without soldering, grinding or soldering.
In general, almost all of the Mokume pieces are finished in a flat sanded look. Mokume, because of the layers and the contrast shows best in a flat finish.
Of course, sometimes pieces are polished and there are several different levels of flat and polished finishes available to a Mokume metal smith. It just depends on the piece and the impact the artist wants.
Here are some more examples of Mokume.
I think that this method of metal working is one of the most interesting and unique techniques that there is.
Here is a cool full screen shot of a piece of Mokume.