CBJ Finishing and Polishing 2

Question 1

What is the primary chemical composition of jeweler's rouge?

Accepted Answer

Ferric oxide (iron oxide)

Answer

Jeweler's rouge is composed of ferric oxide (Fe₂O₃), a very fine iron compound that produces a high-gloss finish on precious metals.

Question 2

What does tumble polishing involve?

Accepted Answer

Placing jewelry in a rotating barrel with abrasive media and burnishing shot

Answer

Tumble polishing uses a rotating barrel filled with abrasive media or steel shot to uniformly polish and deburr multiple pieces simultaneously.

Question 3

Why should separate polishing wheels be used for different compounds?

Accepted Answer

To avoid cross-contaminating compounds, which reduces polishing effectiveness

Answer

Mixing a coarser compound like tripoli into a rouge wheel will introduce scratches during the final polish stage, defeating the purpose of the finer compound.

Question 4

What is 'bright cutting' in the context of jewelry finishing?

Accepted Answer

Using a graver to cut sharp, polished facets directly into the metal surface

Answer

Bright cutting is an engraving technique where a sharpened graver is pushed through metal to create highly polished, light-reflecting facets without additional polishing.

Question 5

What is the purpose of 'pickling' a jewelry piece after soldering and before polishing?

Accepted Answer

To remove oxides, firescale, and flux residue from the surface

Answer

Pickle solution (typically a mild acid) dissolves the oxides, firescale, and flux that form on metal during soldering, leaving a clean surface ready for finishing.

(CBJ) Certified Bench Jeweler Practice Test

(CBJ) Certified Bench Jeweler Practice Test

CBJ Finishing and Polishing 2