Yellow gold jewelry articles are composed of an alloy containing several metals such as: gold, silver, copper, zinc. Such alloying is required to obtain reasonable mechanical properties and hereby mechanical stability. However, alloying with non-gold elements results in shifting the alloy color and appearance from the original pure gold color and hence obtaining pale-yellow colors in low-karat jewelry.
Commercially available master alloys are used to alloy the gold to get karat gold alloys usually in the range between 22K and 9K. The color shift from pure gold color depends on the karat and on the master alloy composition. Therefore, one can obtain same karat alloy in two (or more) different colors, using different master alloys.
Up to date, no master alloy can provide pure gold color or similar.
NanoFine enables jewelry manufacturers to enrich their articles towards a wide range of rich yellow colors without applying any coating!
NanoFine’s technology is based on surface reactions occurring on the jewelry surface. Our system provides precise control on such reactions and hereby enables jewelry manufacturers to enrich and precisely choose the output color of their jewelry items.
In addition, our system works with a single NanoFine material (Nano-P01D) to provide the entire range of colors.