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Cleaning rusted zinc etching plates for museum

I'm a fine arts professor at a University in P.R. I'll like to know how can I cleaned some old zinc etching plates in order to keep them at the University Art Museum. I'm interested in cleaning the rust and preserve them for the future.

Thnks for your attention,
Prof. Evelyn Garcia
University of Puerto Rico
Mayaguez, Campus

Evelyn Garcia
art professor - Mayaguez, Puerto Rico
2007

Zinc can not rust-No Iron- It corrodes, so what do you really have?

James Watts
- Navarre, Florida
2007

You can clean them with 5% EDTA solution(pH must be7!). After treatment you must rinse it very well. Storage reccomendations:max.40% rh,15-18 C temp. Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia
2007

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