| 摘要 |
PROBLEM TO BE SOLVED: To provide a developer composition for a recording paper capable of satisfying both initial color development density and saturated color development density. SOLUTION: This developer composition is characterized in that it is composed of a water dispersion of developer particles which develop a color through chemically reacting with a leuco dye and the average particle diameter of the developer particles is 0.2-2.0 μm and further, 70% or more of the total particles are of an average particle diameter ±0.2 μm. |
