| abstract |
There are provided a coating solution for forming an ultraviolet-absorbing film that has mechanical durability such as abrasion resistance, sufficiently secures colorlessness and transparency, and has less deterioration of ultraviolet-absorbing ability caused by long-time light exposure, and an ultraviolet-absorbing glass article having an ultraviolet-absorbing film that is formed by using the coating solution, has mechanical durability such as abrasion resistance, sufficiently secures colorlessness and transparency, and has less deterioration of ultraviolet-absorbing ability caused by long-time light exposure. A coating solution for forming an ultraviolet-absorbing film including: a silicon oxide-based matrix material component consisting of at least one selected from hydrolyzable silicon compounds; an ultraviolet absorber; an acid having a primary proton pKa from of 1.0 to 5.0; and a water and an ultraviolet-absorbing glass article obtained by using it. |