What is the PVD finish of the contemporary kitchen faucets?

What is the PVD finish of the contemporary kitchen faucets?

What is the PVD finish of the contemporary kitchen faucets?
The process was originally developed to improve the durability of tools and has even been used on NASA's space shuttles. During an intense, high-tech procedure, the finish forms a permanent bond with the best pull out kitchen faucets, rather than a simple coating over the gold kitchen faucet body.