On the Main Image, They Are Pearl Chrome Plating Finishing.
Pearl Chrome is a Chrome Plating on Top of Pearl Nickel Plating.

Introduction Of Pearl Nickel:
Pearl nickel, also known as satin nickel, satin nickel, satin nickel, is a gorgeous appearance, delicate and soft colour plating, low internal stress, good anti-corrosion, is an excellent protective and decorative plating. The pearl nickel plating process first appeared in the late 1950s and has developed rapidly since the 1990s. Pearl nickel can be used directly as a protective decorative coating, but also in the pearl nickel and then coated with other metals, such as chrome, gold, silver, etc., the formation of sand chrome, sand gold and sand silver, its protective decorative effect is stronger. At present, pearl nickel plating has been widely used in the automotive decoration, electronic products, daily hardware, cultural goods and other industries.
Early pearl nickel plating is made by mechanical method, the surface of the plating obtained by this method is rough, lustreless and labour-intensive, and has been gradually eliminated. At present, pearl nickel plating is generally used in 2 methods: compound plating method and emulsifier method, the former method because of the pearl nickel coating gloss is not ideal, the plating solution is not easy to maintain and its application is limited: the latter method is in the watt nickel plating solution to add sand emulsifier, the formation of emulsion, the use of droplets in the cathode surface adsorption and desorption, to get pearl nickel plating, using this method to produce pearl nickel plating The surface has countless overlapping pits, showing a soft pearl effect on the macroscopic level, but in the industrial production process this plating solution needs to be equipped with hot and cold circulating insult, such as no hot and cold circulating device sand type quickly thickened 3-4 hours after the emergence of chaotic sand, need to stop production plus toner filtration, so the production efficiency is extremely low, while wasting materials, production costs are high.