Various kinds of emulsions may be used therefor, for example, including an emulsion for a color-positive film, an emulsion for a color paper, an emulsion for a color-negative film, an emulsion for a color reversal film (containing or not containing a coupler), an emulsion for a photographic material to be used in a photomechanical process (such as a lith film), an emulsion for a cathode-ray displa