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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, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
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