NOVELTY - An aqueous fluorocarbon coating comprises first and second components at weight ratio of 12-25:1. The first component comprises deionized (DI) water, antisettling agent, wetting dispersant, defoamer, pigment, aqueous fluorocarbon resin, substrate wetting agent, leveling agent, cosolvent, catalyst, matting agent, and thickener. The second component is polyisocyanate curing agent comprising hexamethylene diisocyanate (HDI), isophorone diisocyanate (IPDI), and ether ester solvent.    USE - Aqueous fluorocarbon coating for PET film back plate or solar energy back film (claimed).    DETAILED DESCRIPTION - An aqueous fluorocarbon coating comprises first and second components at weight ratio of 12-25:1. The first component comprises 10-18 pts. wt. DI water, 0.1-0.4 pt. wt. antisettling agent, 0.5-2 pts. wt. wetting dispersant, 0.2-0.3 pt. wt. defoamer, 0-35 pts. wt. pigment, 50-70 pts. wt. aqueous fluorocarbon resin, 0.3-0.6 pt. wt. substrate wetting agent, 0.3-0.6 pt. wt. leveling agent, 2.5-4 pts. wt. cosolvent, 0.1-0.3 pt. wt. catalyst, 1-2 pts. wt. matting agent, and 0.2-0.6 pt. wt. thickener. The second component is polyisocyanate curing agent comprising 60-85 pts. wt. HDI, 0-25 pts. wt. IPDI, and 5-25 pts. wt. ether ester solvent. INDEPENDENT CLAIMS are included for:    (1) preparation of fluorocarbon coating by slowly adding antisettling agent to DI water while stirring to form uniform viscous slurry, adding wetting dispersant and defoamer, stirring for 15 minutes, adding pigment, uniformly dispersing, grinding to fineness of less than 10 mu m, filtering to remove grinding medium, adding fluorocarbon resin, cosolvent, substrate wetting agent, leveling agent, catalyst and matting agent, dispersing and grinding to fineness of less than 30 mu m, adding thickener, and adjusting viscosity with DI water to prepare first component; uniformly mixing HDI, optionally IPDI and ether ester solvent to prepare second component; and uniformly mixing first and second components; and    (2) application of fluorocarbon coating including pretreating polyethylene terephthalate (PET) film, applying aqueous fluorocarbon coating, and drying.