| 摘要 |
PURPOSE:To obtain a coloring sheet for recording purpose, which is capable of forming a clear-cut, excellently water-resistant color picture upon contact with a colorless chromogenic dye by adding a multi-valent metal salt of diphenyl acetic acid as a coloring agent, together with a binder, to a coloring layer. CONSTITUTION:In a coloring sheet having a coloring layer containing a coloring agent to form a colored picture upon reaction with a colorless chromogenic dye (e.g., Crystal violet lactone, etc.) and a binder (e.g., gum arabic, PVA, CMC, etc.), formed on a supporter, and the supporter, the coloring agent contains 30- 90wt% (based on the coloring layer) one or more of multivalent metal salts of diphenyl acetic acid (e.g., diphenyl zinc acetate, etc.), togethr with, as needed, 5- 90wt% (based on said multi-valent metal salts) other coloring substances (e.g., acid clay, attapulgite, zeolite, etc.). |
