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Treatment; 03 Jan 1997; Remove corrosion to reveal legends and stabilize.; Metals

Reason: Permanent Exhibition
Description: De greased with Acetone. Immersed in alkaline Rochelle solution with aluminium. Repeated the treatment twice (6mins each time) Washed in tap water for 1 hour changing water three times. Final wash in distilled. Stabilized in 3% Benzatriazole in IMS under vacuum for twenty four hours. Rinsed in IMS. Dried through two changes of acetone.Applied a coat of 3% Paraloid B72 (ethyl methacrylate copolymer) in acetone.
Details: Treatment