Manufacturing

The Manufacturing Process for Karat Gold Bonded Jewelry

BONDED GOLD & SILVER: Describes an application of karat gold applied to sterling silver thru the process of mechanically bonding.

MECHANICALLY BONDED: Metal surfaces are arranged in face to face relationship and compressed together. Two metals are brazed together, (Applying heat and optionally adding a filler metal, solder). The Bonded result is also accomplished through a process of High pressure, Cold and Hot, Bonding which are both currently employed to make Gold Filled.
The process starts by first creating a sheet of 10/14 Kt gold thick and a thick billet of sterling silver.
The material is then fused together with a proprietary process that uses heat and pressure to form a uniform metallurgical bond changing the two materials into one.
The uniform bonded 10KT/ 14KT / Sterling billet is then processed through multiple rolling & annealing operations in order to reduce the thickness of the metal sheet.

The Manufacturing process for jewelry utilizing sheet or tubing starts with the creation of the two precious metal fabricated materials, i.e. 14 Karat Gold and Sterling Silver. Each of these materials starts with the continuous casting of the alloyed materials. This creates a solid “bar or rod” of the material. A bar is created in each of the metal. The bars are then rolled to the required thickness in preparation for the “bonding” process.

 

 

The Manufacturing process for jewelry utilizing wire also starts with the creation of the two precious metal fabricated materials, i.e. 14 Karat Gold and Sterling Silver. Again, each of these materials starts with the continuous casting of the alloyed materials, creating a solid “bar or rod” of the materials. The bars are then rolled to the required thickness in preparation for the “bonding” process.

 

 

Note: The manufacture of Diamond-cut product using bonded tubes. Example: a process that starts with tubes with 5% [1/20] gold, and then are polished and cut, removes gold, often all the way to the silver, resulting in a final product with slightly less than 5% gold.

Additionally, Certain products utilize heavy diamond cutting resulting in a substantial surface that is Sterling Silver.

The Manufacturing Process for Gold Filled Jewelry

GOLD FILLED/ ROLLED GOLD PLATE/ GOLD OVERLAY: The terms used to describe jewelry that has a layer of at least 10 karat gold mechanically bonded to a base metal. Specific percentages of gold apply to the use each of these.

Electroplating Process

GOLD ELECTROPLATE: To affix on all significant surfaces by an electrolytic process, an electroplating of gold or gold alloy (minimum 10K fineness), having a minimum thickness of .175 microns (7 millionths of an inch)

GOLD WASHED/ GOLD FLASHED: To coat or cover with a thin layer of GOLD by electro-deposition when the layer of karat gold is less than .175 microns, (7 millionths), thick of a minimum of 10K gold.

Electroplatingis the process of using electrical currentto coat an electrically conductiveobject with a relatively thin layer of metal. The primary application of electroplating deposits a layer of a metal having some desired property (e.g., abrasionand wear resistance, corrosion protection, lubricity, improvement of aesthetic qualities, etc.) onto a surface lacking that property. Another application uses electroplating to build up thickness on undersized parts.

 

 

 

Comparative Gold Thickness by Process ( typical applications)

Comparative Gold Thickness by Total Metal Thickness ( typical applications)

*Reference, 1000 microns = 1 Millimeter, a human hair is 125 microns.

COATED/COVERED: Describes an application of karat gold applied to metal by various processes.

SURFACE PLATED: Any application of gold (minimum 10 karat) by mechanical process and of such thickness that reasonable durability is assured.

VERMEIL: Describes a base of sterling silver coated, covered or plated, on all significant surfaces with karat gold, (minimum 10K), having a minimum thickness of 2.5 microns (approximately 100 millionths of an inch) of fine gold.