Jewelry Design Jewelry Finishing and Surface Treatments 2

Question 1

What is electroforming in jewelry making?

Accepted Answer

Building up metal thickness by electroplating onto a removable mandrel or core

Answer

Electroforming builds up a substantial layer of metal (typically copper or silver) through electroplating over a wax or mandrel core that is later removed, leaving a hollow metal form.

Question 2

Which metalworking surface technique involves hammering metal from the reverse side to push up a raised relief design?

Accepted Answer

Repoussé

Answer

Repoussé is performed from the back of the metal, using hammers and punches to push the metal outward and create raised three-dimensional relief designs.

Question 3

What is the standard unit of measurement used to describe the thickness of gold plating on jewelry?

Accepted Answer

Microns (micrometers)

Answer

Gold plating thickness is measured in microns (micrometers, µm), with heavy gold plating (HGP) requiring at least 2.5 microns of gold per FTC guidelines.

Question 4

Which chemical is most commonly used to etch copper and brass in jewelry making?

Accepted Answer

Ferric chloride

Answer

Ferric chloride is a widely used etchant for copper and brass, dissolving exposed metal areas to create recessed designs wherever protective resist has not been applied.

Question 5

The Korean metalsmithing technique known as Kum Boo involves permanently bonding which two materials?

Accepted Answer

Fine gold foil to fine silver using heat and pressure

Answer

Kum Boo uses heat and burnishing pressure to diffusion-bond fine gold (24k) foil to fine silver, creating a permanent decorative gold surface without solder or adhesive.

Jewelry Design Practice Test

Jewelry Design Practice Test

Jewelry Design Jewelry Finishing and Surface Treatments 2