TECHNOLOGY FOCUS - POLYMERS - Preferred Properties: The polymer layer has thickness of 1 mu m or more. The polyester support has peak at tan( delta ) of 123 degrees or more measured using dynamic viscoelasticity-measuring apparatus, and intrinsic viscosity of 0.65 dl/g or more. Preferred Composition: The direction (D1) in the polyester support is film longitudinal direction, and film transport direction. The polyester support is polyethylene terephthalate support having terminal carboxyl group content of 20 equivalent/ton or less. The polymer layer has a white layer (1) containing a white pigment and a binder, and a weather-resistance layer containing a fluorine-type polymer and/or silicone-acryl composite resin. The binder contains copolymer including an olefin component and acrylic acid ester component or acid anhydride component. The fluorine-type polymer or silicone-acryl composite resin is a binder derived from aqueous latex. The weather-resistance layer includes weather-resistance layer (3) containing silicone-acryl composite resin, and weather-resistance layer (4) containing fluorine-type polymer on weather-resistance layer (3). Preferred Process: The white layer is provided on one surface (S1) of the polyester support, and weather-resistance layer is provided on surface (S2) opposite to surface (S1). The white layer and the weather-resistance layer are formed by coating. The binder is derived from aqueous latex. The weather-resistance layer is arranged adjacent to the polyester support. During manufacture of protective sheet, polymer layer-forming coating liquid is applied, such that polymer layer has dry thickness of 1 mu m or more. The weather-resistance layer-forming coating liquid is prepared using fluorine-type polymer and/or silicone-acryl composite resin as binder. The polymer layer-forming coating liquid is prepared by dispersing aqueous binder in water as dispersion medium. The white layer-forming coating liquid is coated on single surface (S1) of the polyester support. The weather-resistance layer-forming coating liquid is coated on surface (S2) opposite to surface (S2). The weather-resistance layer (3) is formed using coating liquid containing silicone-acryl composite resin. The weather-resistance layer (4) is formed by applying coating liquid containing fluorine-type polymer on weather-resistance layer (4).