TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The infrared absorber is indium oxide doped with tin, tin oxide doped with antimony, cerium oxide, zinc oxide or agent coated with silica. The mass ratio of the sum total content of the components (A1,A2) with respect to the component (B) is 60/100-1000/100, and the mass ratio of the component (A2) with respect to the sum total content of the components (B,A1) is 0.05/100-40/100. The component (A1) is colloidal silica with average particle diameter of 1-400 nm. The component (A2) has absorption of 0.1% or more in the wavelength of 1000-2500 nm.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The composition further contains hydrolyzable silicon compound of formula: R1nSiX4-n (I), X3SiR2n'-SiX3 (II) and R3-(O-Si(OR3)2)n"-OR3 (III).R1=H, 1-10C alkyl optionally substituted by halo, hydroxy, mercapto, amino, (meth)acryloyl or epoxy, alkenyl, alkynyl or aryl;X=hydrolyzable group;n=0-3;R2=1-6C alkylene or phenylene;n'=0 or 1;R3=1-6C alkyl;andn"=2-8.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The component (B) is obtained by polymerizing components (b1,b2) in the presence of emulsifier and polymerization undiluted solution containing water. The component (b1) is hydrolyzable silicon compound. The component (b2) is vinyl monomer having functional group chosen from hydroxyl group, carboxyl group, amide group, amino group and ether group. The mass ratio of the components (b1,B) is 0.1/1-0.5/1, and the mass ratio of the components (b2,A1) is 0.1/1-1/1. The component (B) has core-shell structure consisting of core layer and 1 or more shell layers. The mass ratio of the components (b1,b2) in the core layer is 0.01/1-1/1 and the mass ratio of the components (b1,b2) in the outermost layer is 0.1/1-5/1. The components (b1,b2) are polymerized in the presence of polymerization undiluted solution containing seed particles comprising the components (b1,b2) to obtain the core layer. The component (b2) has secondary amide group and/or tertiary amide group. The component (B) has number average particle diameter of 10-100 nm.