| 摘要 |
PURPOSE: To obtain a heat-insulated cup having a clearly-visible measuring mark without an increase in production cost. CONSTITUTION: The outer face of a cup main body 12 is fully covered with a protection cover 20. A mark line 13 is printed on the outer face of a sidewall 14 of the cup main body 12. The protection cover 20 has a multiple layer construction consisting of thin paper, emboss paper and liner paper in the oder from the cup main body 12 side. Fiberboard for the sidewall 14 is 170-310g/m<2> in basis weight and 220-420μm in thickness. The value Bw in Munsell system of the color of the sidewall 14 is 6-10, the value Bm in Munsell system of the mark line 13 is 0-7, and an equation Bw-Bm#>=3 is established. Thereby, the mark line 13 is visible only with light from inside the cup main body 12 covered with the protection cover 20.
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