| 摘要 |
PROBLEM TO BE SOLVED: To provide a surface treatment method for a synthetic resin sheet, wherein the transmitting amount of ultraviolet rays in the transparent synthetic resin sheet can be reduced at a low cost. SOLUTION: A clear case 10 includes a front surface member 12, a bottom surface member 14, a top surface member 16, a back surface member 18 and side surface members 22a and 22b comprising the synthetic resin sheet. The surfaces of the side surface members 22a and 22b are coated with an ultraviolet ray absorbing ink containing a ultraviolet ray absorbing agent by silk screen printing, and thus, ultraviolet ray absorbing printing layers 30a and 30b are formed.
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