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How to tackle Coat Sagging

October 11,2016.
Sagging of coating usually refers to the thicker coating along the bottom edge of the visors (coated parts). It occurs when different models of visors are changed in batch production and the withdrawal rates are not adjusted accordingly. For ease of production, a vacuum sucker is usually fitted in the hardcoating machine to  manually remove the coating build-up on lower edge by visual inspection.

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