Material composition for pressure measurement, material for pressure measurement, and material set for pressure measurement
AssigneeFUJIFILM Corporation
InventorSatoshi Tanaka
Life of this patent
Estimating the term…
Abstract
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<D50B Equation 1.
Claims19
A material for pressure measurement, comprising:
- 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, wherein, in a case of color formation, a density exceeding 0.02 is obtained as a density difference ΔD1 obtained by subtracting a density before applying a pressure from a density after color formation by applying a pressure at 0.01 MPa;
- and a volume standard median diameter D50A of the microcapsules A and a volume standard median diameter D50B of the microcapsules B satisfy Equation 1:
- D50A<D50B Equation 1.
A material composition for pressure measurement, comprising:
- microcapsules A encapsulating an electron-donating colorless dye precursor;
- and
- microcapsules B not encapsulating an electron-donating colorless dye precursor,
- wherein, in a case of color formation, a density exceeding 0.02 is obtained as a density difference ΔD1 obtained by subtracting a density before applying a pressure from a density after color formation by applying a pressure at 0.01 MPa, and a volume standard median diameter D50A of the microcapsules A and a volume standard median diameter D50B of the microcapsules B satisfy Equation 1:
- D50A<D50B Equation 1.
Dependencies are inferred from the claim text.