# A TRIED AND TESTED ANTI-TARNISH COATING! !
THIS SOLUTION ENABLES THE APPEARANCE OF THE METAL TO BE RETAINED WITHOUT RISK OF ALTERATION.
ProAg and ProAu from POSITIVE COATING are thin coating deposits, which are well defined, transparent, dense and waterproof, and which provide excellent protection against tarnishing of silver and 4N and 5N gold alloys.
Whether in thin layers or in solid gold and silver, the anti-tarnish treatments from POSITIVE COATING protect watch parts and other components in different business sectors (jewelry, writing instruments, leather goods, accessories, currency, etc).
The key strengths of this protection:
• ultra-thin, dense and waterproof layer
• invisible, no modification of the component’s color
• excellent chemical stability
• protection of materials which are susceptible to tarnishing, primarily silver and 4N and 5N gold alloys
Founded in 2004, POSITIVE COATING specializes in the development of innovative solutions in the field of surface treatments based on cutting-edge chemical and physical treatments such as PVD (Physical Vapor Deposition) and ALD (Atomic Layer Deposition) technologies. Situated at the heart of a prestigious micro-technology industry, the business contributes to the development of superior technological products.