How Is Vacuum Coating Color Formed?

How is vacuum coating color formed?

Operation principle of vacuum coating: Physical Vapor Deposition (PVD) technology means that under vacuum conditions, the material source -- solid or liquid surface is vaporized into gaseous atoms and molecules or partially ionized into ions by Physical method, and then through a low-pressure gas (or plasma) process, The technique of depositing a thin film with a particular function on a substrate surface.
But that's too complicated to say, right?
Easy, let's look at the picture!

(Schematic diagram of vacuum coating process)

1. 
How do colors form?
In a furnace with a high vacuum and high temperature, different gases are added to form different colors by combining with the ions emitted. Then the changed ions are deposited on the surface of the product to form a dense film layer. If N2 is added, the color of plating is golden; Add C₂H₂, the color is black; Add O2, the color will be colorful and blue; Such as N2 and C₂H₂, the color will be rose gold and so on, so the color is a variety of gases and ions cross the effect of oh!
2.
How to control chroma?
You might wonder, why do some of the same gases have two different colors? The combination of gas and ions forms the whole color system, but the color depth and change are also affected by air pressure and time, usually, in direct proportion to the trend, high air pressure for a long time is deep, low air pressure for a short time is shallow.
Different colors of the film layer not only improve the beauty of the product, in high temperature and high-pressure high cleanliness production environment, the use of green environmental protection materials, so the product is beautiful, safe and environmental protection.

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