Andrew Nyce Designs is in the final stages of developing seamless Contour Mokume Gane rings. Presently, our Contour Mokume Gane rings are patterned using flat sheet which, when cut to size and formed into a ring, results in a seam. The seam, in some cases, can disrupt the flowing pattern of the Mokume Gane. The new Seamless Mokume Gane rings are made with a random pattern and will complement our existing line of Contour Mokume Gane rings.

The seamless Mokume Gane process provides a fast, efficient, and lower cost method of making our Contour-patterned Mokume Gane rings. The advantages of seamless Mokume Gane vs patterned flat sheet include:

• Seamless Mokume Gane tube provides an unbroken pattern.

• More rings can be made from the seamless tube than from a hand patterned sheet of Mokume Gane, which translates to a lower cost per ring; this cost-savings is passed on to our customers.

• Seamless Mokume Gane rings can be sized up or down quickly and efficiently compared with Mokume Gane rings with seams.

Contour Mokume Gane Process

The process I currently use for making Contour Mokume Gane involves bonding a multi-layer stack of precious metal alloy sheets to form a billet. The billet is hot forged and cold rolled to a thickness suitable for hand-patterning and subsequently rolling into a sheet from which ring strips are cut. The ends of the strips are soldered together to form a ring that, typically, is set in a channel or lined. Part of this process involves aligning the Mokume pattern on either end of the strip.

New Seamless Process

In order to create seamless Mokume, I utilize a new die to bond the layers of precious metal alloy sheets. The process for bonding, hot forging and cold rolling the resulting billet for making seamless rings is identical to that for flat sheet Mokume. The billet is hot forged and cold rolled to the precise thickness suitable for deep drawing.

In the deep drawing process, the billet is placed over a tapered die and a punch is placed on top. The assembly is placed in a hydraulic press and pressure is applied forcing the punch to draw the disc through the die. The resulting cup-shaped form is successively drawn through smaller and smaller dies to form a long seamless tube that is suitable for patterning. Patterning the seamless tube is similar to that for flat sheet with the exception of a proprietary step called “ironing” which further reduces the thickness of the tube.

My current work with seamless Mokume is built on the experiments that I have conducted on seamless Mokume over the last years 6 years. Earlier experiments involved deep drawing a pre-patterned Mokume Gane sheet. The resulting pattern contained undesirable distortions and was not suitable for rings. Two years ago, I found that I could pattern and “iron” a tube of Copper and Sterling Silver Mokume Gane and achieve an undistorted pattern that was very attractive.

Seamless tube of Copper/Sterling Silver Mokume Gane

So, I decided to extend the experiment to our Glacial Mist composition (14K Palladium White Gold with Palladium-enhanced Sterling Silver). Currently, I am patterning a tube of Glacial Mist Mokume Gane and plan to offer customers seamless rings made from this material in early 2010.