| abstract |
The present disclosure relates to a chromonic film and a pressure test film, the chromonic film comprising: a substrate on which other layers are coated to form the chromonic film; a concavo-convex structure layer formed on the substrate; and a chromonic layer, which is coated on the concavo-convex structure layer and contains microcapsules containing an electron-donating leuco dye precursor therein, the electron-donating leuco dye contacts the electron-accepting compound and is colored, wherein when the color develops When the film is pressed, the concave-convex structure layer presses the chromophoric layer, so that the microcapsules in the chromophoric layer are ruptured and the electron-donating leuco dye precursor is released. The chromophoric film realizes the reduction and concentration of the pressure test film and the actual pressure area of the microcapsule through the concave-convex structure layer, so even if a small pressure is applied to the pressure test film, the high sensitivity of the pressure test film can be achieved. |