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Gold electroplate

Gold electroplate
NASA/JPL, Public domain · Wikimedia Commons

Deposited electrolytically rather than mechanically bonded, and with no weight ratio at all — only a durability standard. The thinnest of the gold-coating terms.

PropertyValueAuthority
KaratPlating at least 10K [1]§ 23.3(c)(3)
US legal requirementElectroplated with gold or a gold alloy of not less than 10 karat fineness, of such karat fineness, thickness and extent of surface coverage that reasonable durability is assured. Note there is NO weight-ratio requirement here, unlike gold filled (1/20th) and gold plate (1/40th). [1]§ 23.3(b)(8), (c)(3)

Sources

  1. 16 CFR Part 23 — Guides for the Jewelry, Precious Metals, and Pewter Industries — U.S. Government Publishing Office (16 CFR Part 23)