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HARD ANODISING COLOUR

Dear sir,

We are facing the following problems in our Hard coat Anodising. Patchy marks like small round, found after hard anodising. In these areas colour is dull, and we tried with regular cleaning methods only. please advise us how to avoid this, can we do any special pre cleaning process or this is a raw material problem.

ELANGOVAN
- INDIA
1999

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