Glossary

Yellowing: This effect on oil paintings is usually caused by one of three reasons: excessive use of linseed oil medium; applying any of the varnishes that are prone to yellow with age; or most often - an accumulation of dirt embedded into the varnish.

Yellow Gold: Pure gold is 24 Karat, which is too soft for gold jewelry.  By combining with copper and silver, yellow gold retains a rich yellow color while increasing its durability.

10 Karat Yellow Gold: 10 Karat gold (10K) is 10 parts pure gold and 14 parts other metal alloys.  By combining with copper and silver, yellow gold retains a rich yellow color while increasing its durability.

14 Karat Yellow Gold: 14 Karat gold is 14 parts pure gold and 10 parts other metal alloys.  By combining with copper and silver, yellow gold retains a rich yellow color while increasing its durability.

18 Karat Yellow Gold: 18 Karat gold (18K) is 18 parts pure gold and 6 parts other metal alloys. By combining with copper and silver, yellow gold retains a rich yellow color while increasing its durability