Rolled Gold
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Gold-filled is a type of
composite Composite or compositing may refer to: Materials * Composite material, a material that is made from several different substances ** Metal matrix composite, composed of metal and other parts ** Cermet, a composite of ceramic and metallic material ...
material. Composites are formed from two or more constituent materials with different properties that, when combined, create a new material with enhanced properties. Gold-filled material is made by bonding a layer of gold alloy to a base metal core (typically brass, but sometimes copper or silver). This creates a material with the appearance and durability of solid gold, but at a lower cost. Gold-filled material is used to create a variety of products, including: * Jewelry: Gold-filled is a popular choice for jewelry because it's durable, affordable, and hypoallergenic. * Findings and components: Gold-filled is also used to make jewelry findings (e.g., clasps, jump rings) and other components. * Industrial and technical applications: While less common, gold-filled can be used in certain industrial applications where its properties are beneficial. Regulations and Standards In the United States, the Federal Trade Commission (FTC) regulates the term "gold-filled" to protect consumers. According to FTC regulations, gold-filled jewelry must contain a minimum of 5% gold by weight. This ensures a significant layer of gold that is much thicker than standard gold plating. Reputable manufacturers and sellers in the US adhere to these FTC regulations, ensuring consistent quality and consumer protection. Markings and Abbreviations The related terms "rolled gold plate" and "gold overlay" may legally be used in some contexts if the layer of 14k gold constitutes no less than 5% weight of the item. In the jewelry industry, gold-filled is never abbreviated as "GF" or "gold GF" on product markings. This abbreviation is incompatible with FTC guidelines, which require clear labeling of the gold content and fineness (e.g., 1/20 14K GF). Most high quality gold-filled pieces have the same appearance as high carat gold, and gold-filled items, even with daily wear, can last 10 to 30 years though the layer of gold will eventually wear off exposing the metal underneath. The layer of gold on gold-filled items is 5 to 10 times thicker than that produced by regular
gold plating Gold plating is a method of depositing a thin layer of gold onto the surface of another metal, most often copper or silver (to make silver-gilt), by a chemical or electrochemical (electroplating) process. Plating refers to modern coating met ...
, and 15 to 25 times thicker than that produced by gold electroplate (sometimes stamped HGE for "high grade electroplate" or HGP for "heavy gold plate", though neither of these terms have any legal meaning, and indicate only that the item is gold plated).


Definition

In the United States, the quality of gold-filled composite is defined by the
Federal Trade Commission The Federal Trade Commission (FTC) is an independent agency of the United States government whose principal mission is the enforcement of civil (non-criminal) United States antitrust law, antitrust law and the promotion of consumer protection. It ...
(FTC). If the gold layer is 10kt fineness, the minimum weight of the plated layer on an item stamped gold-filled marks according to the
Federal Trade Commission The Federal Trade Commission (FTC) is an independent agency of the United States government whose principal mission is the enforcement of civil (non-criminal) United States antitrust law, antitrust law and the promotion of consumer protection. It ...
(FTC) must equal at least of the total weight of the item. If the gold layer is 12 kt or higher, the minimum layer of karat gold in an item stamped gold-filled marks must equal at least the total weight of the item. The most common stamps found on gold-filled jewelry are 12kt GF and 14kt GF. Also common is 10kt. These standards are for modern gold-filled items. It is not uncommon to see 14kt gold-filled marks, plus many other variations, on items from the 1930s, 1940s, etc., which would have to be marked "Rolled Gold Plate". The Federal Trade Commission allows the use of the terms "rolled gold plate," "R.G.P" or "gold overlay" on items with lower thicknesses of gold than are required for "gold-filled." An example would be an item stamped as " 10kt RGP" meaning that the object is plated with 10kt gold at a thickness that makes weight of the plated layer equal to one-fortieth of the weight of the metal parts of the object. "Double clad" gold-filled sheet is produced with the thickness of gold on each side. One-twentieth 14Kt double clad gold-filled has a layer on each side of 14Kt making the total content of gold . The thinner layer on each side does not wear as well as single clad gold-filled.


See also

*
Costume jewelry Costume or fashion jewelry includes a range of decorative items worn for personal adornment that are manufactured as less expensive ornamentation to complement a particular fashionable outfit or garmentBaker, Lillian. Fifty Years of Collectabl ...
* Vermeil


References

{{Reflist Precious metals Types of jewellery