Gold Vermeil is a term created in France for the standard level of high-end plating, which was stated to be 3 microns over Sterling Silver, thus no piece in brass can ever claim the term “Vermeil“. In the US it is standard or modified to suggest 2,5 microns is the level needed over Sterling Silver to be considered Vermeil.
We plate at any level requested by our clients, but in order for us to claim it as Vermeil, our standard is a minimum of 3 microns. Of course, if 6 microns are requested, it would be twice the gold thickness of 3 microns, which would be thicker and better for wear and longevity. However, this may increase the price, and at those costs, solid gold may be the preferred option.