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Lack of chromic fill in the anodizing process

I am anodizing a structural membrane ( 8" x 2" ). Occasionally one side of the part does not get Chromic Seal and just shows the color of the Anodized Aluminum. Can you explain the reason why?

George Samuel
Intercontinental Manufacturing - Garland,Texas, USA
2003

2003

It's very hard to tell from this distance, but are you sure that side of the item is anodized? Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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