Copper Antitarnish
▶ AT-2000 :
An oxidation inhibitor concentrate which is added to water to prevent tarnishing of copper and copper alloys.
AT-2000 reacts chemically with clean copper surfaces to form an invisible barrier that resists handling and environmental effects. AT-2000 can be used prior to resist application, after electroless copper, and in the SMOBC process.
▶ AT-3000 :
Concentrated, acid-based anti-tarnish for use after electroless copper or any other process that requires an extended hold time or adhesion promoter.