... in power plant flue gas desulfurization insulation, chemical plants, oil, petrochemical, nuclear power plant.2.) Insulating glass material ( ... 2. the foils surface is clean without any corrosion, oil stains, puckering slits, scratches visible striation, rolled marks, shaken traces ... , abrasive marks or dark lines. 4. no yellowish oil stains, bubbles or seams.7. Appearance quality: The foil fracture ...