摘要 |
PROBLEM TO BE SOLVED: To provide a hard coating compsn. making a coating film free from the sticking and inclusion of foreign matter at the time of precuring and causing no surface distortion and provide a method capable of efficiently forming a hard coating film without using an expensive device. SOLUTION: A coloring material having absorption in an IR wavelength region is added to a hard coating compsn. consisting essentially of one or more kinds of silane coupling agents and one or more kinds of metal oxide sols to obtain the objective hard coating compsn. The top of a plastic lens substrate is coated with this compsn., the resultant coating film is precured by irradiation with IR and then concluding curing is carried out to form the objective hard coating film. |