| 摘要 |
PROBLEM TO BE SOLVED: To provide an ear wax protection device in which damages of a film can be easily confirmed. SOLUTION: A high contrast between a film 4 and a support 1 accompanied thereby is adopted. When cracks occur in the film, the support of a background can be easily detected. For instance, a luminosity contrast between the film 4 and the support 1 is greater than 0.1. When a high hue contrast is required, a hue of the film is apart at least at 60°on a blue-yellow-red-hue ring from a hue of the support. COPYRIGHT: (C)2007,JPO&INPIT
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