Provided are a material for pressure measurement, including a color forming layer that contains microcapsules A encapsulating an electron-donating colorless dye precursor and microcapsules B not encapsulating an electron-donating colorless dye precursor, in which a volume standard median diameter D50A of the microcapsules A and a volume standard median diameter D50B of the microcapsules B satisfy Equation 1; a material composition for pressure measurement; and a material set for pressure measurement:
D50A
本发明提供了一种用于压力测量的材料,包括包含封装了电子负载型无色染料前体的微胶囊 A 和未封装电子负载型无色染料前体的微胶囊 B 的颜色形成层,其中微胶囊 A 的体积标准中值直径 D50A 和微胶囊 B 的体积标准中值直径 D50B 满足等式 1;一种用于压力测量的材料组合物;以及一套用于压力测量的材料:
D50A
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