TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Condensate: The condensate of silicone compound is a hydrolysis substance of 4-functional alkoxysilane and/or condensate of partial hydrolysis component.Preferred Resin Film: The dry outermost coating layer contains porous silica microparticles with outer covering, magnesium fluoride microparticle and fluorine group porous microparticles. The dry outermost coating layer having refractive index of 1.50 or more comprises metal oxide microparticles which are electroconductive metal oxides or optical semiconductors. At least one transparent resin layer is formed between the base film and the dry outermost coating layer. The transparent resin layer comprises light diffusion component containing inorganic particle with ultraviolet absorption property. A color printing layer is formed on the backside of the base film. The refractive index of the outermost coating layer formed on the base film is higher than or lower than 0.3 with respect to the refractive index of the transparent resin layer. EXAMPLE - Methanol (in pts.wt.) (356) was added to tetraethoxy silane (208), water (126) and hydrochloric acid (18). The content was mixed to form a liquid mixture. The liquid mixture was stirred at 25 degreesC for 2 hours to form silicone resin having weight average molecular weight of 4000. The isopropanol dispersed silica microparticle OSCAL1432 having primary particle diameter 10-20 nm was mixed with the silicone resin in a weight ratio of 40:60 to form a coating material composition. The composition was left for 1 hour. The composition was applied on acryl surface of a composite film Kureha KFC film which had total film thickness of 50 microns, acryl thickness of 46 microns and polyvinylidene fluoride thickness of 5 microns. The coating was dried and heat processed for 10 minutes at 80 degreesC in an oxygen atmosphere to form coating layer with thickness of 100 nm. A composite resin film was obtained. The composite film had total light transmittance of 93%, haze of 0.4%, refractive index of 1.43 and water droplet contact angle of 15 degrees. The composite film was left at outdoors for 6 months. The total light transmittance of the composite film after 6 months was 92.8%.