| 摘要 |
PURPOSE:To improve sensitivity, gradation, graininess, sharpness, resolving power, covering power, image quality, and pressurizing property by using silver halide particles, many of which are occupied by planar silver halide particles having two sheets of twin planes parallel with the main plane, and monodispersedly distributing the sizes of the planar silver halide particles. CONSTITUTION:This silver halide emulsion contains at least a dispersion medium and AgX (silver halide) particles, in which more than 95%, more preferably >=99%, of the total projection area of the AgX particles are occupied by the planar particles having two sheets of the parallel twin planes and the sizes of said planar particles are monodispersedly distributed. The monodispersibility referred to here is expressed by the coefft. of fluctuation (the value obtd. after the fluctuation (standard deviation) of the particle size expressed by the diameter converted to the circle of the projection area of the planar particles is divided by an average particle size). The sensitivity, gradation, graininess, sharpness, resolving power, covering power, image quality, preservable property, latent image stability, and pressurizing characteristic are improved in this way. |
