Last edited: 25 February, 2015 - 17:29
Michael Friedberg Wrote:The trouble with Wikipedia, aside from sometimes amateur contributions, is that one can look up words or concepts out of context. In watchmaking, dials usually have precise meanings. Jack Forster, a good friend, once explained the differences in dials as:"Watchmaker artisans today can draw on a wide range of traditional and modern techniques and materials, but which is which? The names are, confusingly, sometimes used interchangeably but each means a particular method and medium. Enamel –true enamel is also known as “vitreous” (glassy) enamel. An extremely ancient technique dating back to ancient Egypt, vitreous enamel uses finely powdered colored glass, which is applied to a metal backing. The enamel is then fired in an oven hot enough to melt the glass, producing an even, transparent or translucent surface. Porcelain –a ceramic medium. Porcelain, like enamel, undergoes some vitrification when fired, but the material itself usually contains a significant percentage of clay and other materials, unlike vitreous enamel which is pure glass. Must be fired at a much higher temperature than most other ceramics to achieve vitrification (the formation of glass in the ceramic body.) Cold Enamel –epoxy resins, which can be produced in a tremendous range of colors and transparencies. Much used in horology in the production of fine art painted dials as well as translucent colored surface treatments. Much less brittle than vitreous enamels and do not require firing to harden.But even these categories reflect over-simplications. And, also, not all (in fact not most) metal dials have guilloche or engine-turning. The base of most fine watch dials in the past 100 years, aside from speciality items, is brass. Porcelain is seldom used, and not for IWC during this period.
Last edited: 13 February, 2012 - 11:42