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"Preventing tarnishing of metal jewelry"


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We are a manufacturing company which specializes in metal casted costume jewelry items. We are having problems with items which tarnish within a short period of time. Our challenge is to find a chemical formula to allow these items not to tarnish. Our items are silver plated, but we need an anti tarnish formula to maintain their appearance.

We know about E-coating which prevents tarnishing.

Is E-coating the only solution?

What is the formula for E-coating?

Are there other solutions?

What treatment is required?

Luis Gutierrez
- Los Angeles California


There are several ways to prevent silver from tarnishing. E coat is one way and requires equipment and tanks similar to electroplating in addition to special filters and an oven for baking. Several companies make proprietary chemistry for the coating bath. This process is best done immediately after the silver plating without allowing the parts to dry. Other alternatives include: Rhodium plating, Platinum plating, Chromate conversion coating, and dip and rinse organic films. You can also spray or dip your items with clear lacquer.

Neil Bell
Red Sky Plating
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Albuquerque, New Mexico
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Clear air dry lacquer can be sprayed or dipped on your jewelry to stop tarnishing.

Les Trinity
- Middlesex, New Jersey

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