In my studio, since most of my students pour their own ingots and
roll out their own stock, the B and S thickness gauge, kept below our
big Durston D2 mill, is used as a method of “common vocabulary” to
more accurately describe sheet or wire thickness. When a project is
planned, we consider the inherent strength of the metal being worked,
and the requirements it needs to be, such as thickness, width and
length.
Say we are making a fine silver bezel for an extremely high stone,
and another for a small flat stone. The higher stone needs more
thickness as well as heighth, so we might roll out the bezel 8 mm
wide, and perhaps 20 gauge thick, making a high but strong bezel. The
thinner stone needs a thinner gauge bezel, maybe only 3 mm wide, and
only 22 ga. thick. These have to be custom made, as they don’t exist
in any catalog I am aware of. If these bezels were being soldered
onto a back plate, then you would have to take the strength, finished
weight ( earrings versus pendant, for instance) and even likelihood
of warpage when soldering into consideration when rolling out the
backplate.
With the rolling mill, we are able to generate exactly the
thicknesses, widths, and lengths needed for each project, and need
not be concerned with what is commercially available that “could
work”.
I feel that fabrication for one-of-a-kind work should flow easily
between design on paper to fabricated metal. So, a system that allows
you to create the metal stock which best matches the design
requirements, would give you the best advantage, I think.
There is also a wonderful freedom in knowing that if something
doesn’t work out as you had planned, just a little more time is
required to make new stock. Nothing is “ruined” and must be
re-ordered.
John Donovan is right. At a point, you will just “feel” with
experience, what gauge or thickness is best for each project, as you
create your stock.
Jay Whaley