TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The concentration of phosphoric acid solution containing aqueous solvent is 30-100 wt.%. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 50-60 degrees C (excluding 50 degrees C), then the amount of crystals having particle size of less than 100 nm is 80% or more and amount of crystals having particle size of less than 50 nm is 50% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 40-50 degrees C (excluding 40 degrees C), then the amount of crystals having particle size of less than 100 nm is 75% or more and amount of crystals having particle size of less than 50 nm is 45% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 30-40 degrees C (excluding 30 degrees C), then the amount of crystals having particle size of less than 100 nm is 75% or more and amount of crystals having particle size of less than 50 nm is 45% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 20-30 degrees C (excluding 20 degrees C), then the amount of crystals having particle size of less than 100 nm is 70% or more and amount of crystals having particle size of less than 50 nm is 50% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 10-20 degrees C (excluding 10 degrees C), then the amount of crystals having particle size of less than 100 nm is 75% or more and amount of crystals having particle size of less than 50 nm is 20% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 0-10 degrees C, then the amount of crystals having particle size of less than 100 nm is 75% or more and amount of crystals having particle size of less than 50 nm is 5% or more, with respect to 100% total of the titanyl phthalocyanine crystals observed using scanning microscope. When the temperature at the time of stir-mixing dispersion liquid with mixture of organic solvent and water is 0-60 degrees C, then the titanyl phthalocyanine crystal contains YK-type titanyl phthalocyanine crystal. Preferred Condition: The dispersion liquid is stir-mixed with mixture of organic solvent and water at 0-70 degrees C.