as defined by the Federal Trade Commission is a deposit of a minimum of 7 millionths of an inch of gold
An electrolytic coating with gold, or with an alloy of not less than 10% fineness to a minimum thickness throughout that is equivalent to seven millionths of an inch. This means that where the fineness is less than 24kt, the thickness must be proportionately greater, so that the same amount of fine gold is seven millionths of an inch, it may be marked - heavy gold electroplate.
Process by which 24 karat gold is deposited on another metal electrolytically. The plating must be at least seven millionths of an inch thick.
A coating of atleast 10 karat gold plated on a base metal by electrolysis. The gold plating must be at least seven-millionths of an inch thick.
Articles made on a non-precious metal on which is deposited pure gold by the process of electroplating. Federal standards require a thickness of at least 7 millionths of an inch of at least 10K gold.