... range to avoid explosion. (7) Check of workpiece, air-blower, preheating, powder spraying and leak 2. Polyester powder ... ,labels and sign boards,daily hardwares,steel window frame,air conditioner,aluminium articles and outdoor utensils etc. 3. ... (scratch)2H (pencil hardness)Adhesion (grade)1Impact resistance (drop hammer)=50kg/cmFlexibility1mmGloss (60°)High gloss=95%Salt fog resistance500h ...