Gold filled
A mechanically bonded gold layer that must be at least 1/20th of the article by weight — twenty times the gold of ordinary plate, and the reason it wears for decades rather than months.
| Property | Value | Authority |
|---|---|---|
| Karat | Plating at least 10K [1] | § 23.3(c)(2) |
| US legal requirement | A gold alloy of not less than 10 karat fineness, affixed to all significant surfaces by soldering, brazing, welding or other mechanical means, of reasonable durability, where the plating constitutes AT LEAST 1/20th of the weight of the metal in the entire article. The karat fineness designation must immediately precede the term with equal conspicuousness. [1] | § 23.3(c)(2) |
Sources
- 16 CFR Part 23 — Guides for the Jewelry, Precious Metals, and Pewter Industries — U.S. Government Publishing Office (16 CFR Part 23)