Ultraviolet-ray-curable composition and use thereof

A UV curable composition, comprising:

• (S) 90 to 99.99 parts by mass of one or more of the following component (S1) or component (S2);
• (S1) an organopolysiloxane and/or organosilane having a UV curable functional group,
• (S2) a mixture containing
• (A) a compound with a UV curable functional group, with or without silicon atoms, and
• (B) an organopolysiloxane without a UV curable functional group, at a mass ratio of 5:95 to 95:5;
• and
• (C) 0.01 to 10 parts by mass of a UV absorbing compound;
• wherein the total of component (S) and component (C) is 100 parts by mass;
• wherein when the composition is applied to an arbitrary substrate so that the thickness after curing is 10 μm, and light irradiation is performed such that the integrated light intensity at least at one wavelength selected from 365 to 405 nm is 2 to 8 J/cm2, the composition can be cured upon completion of irradiation or within 5 minutes thereafter;
• and
• wherein the resulting cured material with a thickness of 10 μm has a light transmittance of 98% or more at a wavelength of 450 nm and a light transmittance of 50% or less at least at one point in the wavelength range of 360 to 405 nm.