Silver Anti-Tarnish Processes Prevent Yellowing Under Harsh Conditions

Technic offers Techniseal and Tarniban KS II silver anti-tarnish processes designed to prevent yellow discoloration under harsh conditions. Both can be used in barrel, rack and high-speed reel-to-reel applications.

Techniseal is an electrolytic process that deposits a nano-scale inorganic coating on the surface of the silver deposit within five seconds, making it particularly suited for reel-to-reel applications According to the company, silver deposits treated with this process pass all ammonium and potassium sulfide tests, and it prevents silver discoloration caused by high-temperature exposure, making it especially useful for automotive “under the hood” and LED applications. Techniseal also prevents discoloration on silver-plated castings after long-term exposure to temperatures higher than 232°C and under humid storage conditions.

Tarniban KS II is an organo-thiol process that can be used in immersion or electrolytic applications. It forms a self-assembled molecular barrier layer on silver deposits and prevents discoloration at temperatures below 232°C. The company says this product withstands all standard ammonium and potassium sulfide tests, and provides a more lubricious coating to the silver deposit. Rack and barrel applications require only simple immersion for at least 30 seconds, while an electrolytic treatment is recommended for reel-to-reel applications for full protection of the silver deposit in just five to 10 seconds.