| 摘要 |
PROBLEM TO BE SOLVED: To provide a material for pressure measurement using a color development reaction between an electron donative color-less dye precursor and an electron acceptive compound, which is a material for pressure measurement prevented from developing color owing to rubbing. SOLUTION: This material for pressure measurement includes a first material with a coloring agent layer provided on a base material, with the first material containing micro capsules that include at least the electron donative color-less dye precursor, and a second material with a color developer layer containing the electron acceptive compound provided on a base material. The arithmetic average roughness Ra of the surface of the developer layer is 1.1μm or less. COPYRIGHT: (C)2009,JPO&INPIT
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