| abstract |
A pressure-sensitive adhesive sheet 1 which comprises a first pressure-sensitive adhesive layer 2, a substrate 3 disposed on one surface of the first pressure-sensitive adhesive layer 2, and a second pressure-sensitive adhesive layer 4, which has been disposed on one surface of the substrate 3. The first pressure-sensitive adhesive layer 2 comprises a pressure-sensitive adhesive composition which, upon irradiation with actinic rays, can decrease in the transmittance of visible light with 550-nm wavelength. The substrate 3 and/or the second pressure-sensitive adhesive layer 4 has an average transmittance for the actinic rays of 15% or less. |