25% metal will be selected according to different production requirements:
K gold can be made into various colors according to needs, and K gold can be divided into colored gold alloy and platinum alloy according to colors. Au-Ag-Cu(-Zn) alloy is the most commonly used colored gold alloy in ornaments.
Platinum alloys are mostly Au-Ag-Ni(Cu, Zn) and Au-Ag-Pd(-Zn, Cu) alloys.
Gold mixed with 25% palladium or nickel and zinc. , will turn white, its main component is gold. This name is platinum, commonly known as K gold.
Gold can only be made of ternary alloys of gold, silver and copper. Yellow is the true color of gold, which is the color of most jewelry commercial gold. It keeps the color of gold as much as possible.
Red K gold can be made of ternary alloy of gold, silver and copper, but increasing the proportion of copper makes the color close to that of copper, which is not very bright. Red K gold is an alloy formed by gold and aluminum, which is fragile and difficult to process. Reducing the proportion of aluminum forms purple gold, whose lavender is quite charming and fragile, and it is difficult to process.
Green K-gold can be made of ternary alloy of gold, silver and copper, but almost all green K-gold can be formed if cadmium causing green is added to any K-gold in an amount of 2%-4%.
The basic component of blue K gold is the alloy of gold and iron, but its production process is extremely confidential and its patents have been registered all over the world. According to this K-gold, cobalt atoms are implanted on its surface.
Gray gold usually comes from the action of high concentration of iron. Gray gold can be made by adding iron to high-quality gold.