[TANI, Komomo 谷　小桃, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, FUJIMOTO, Tatsuo 藤本　辰雄, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, FUJIMOTO, Tatsuo 藤本　辰雄, TSUGE, Hiroshi 柘植　弘志, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, FUJIMOTO, Tatsuo 藤本　辰雄, TSUGE, Hiroshi 柘植　弘志, KAMEI, Kazuhito 亀井　一人, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, FUJIMOTO, Tatsuo 藤本　辰雄, TSUGE, Hiroshi 柘植　弘志, KAMEI, Kazuhito 亀井　一人, KUSUNOKI, Kazuhiko 楠　一彦, TANI, Komomo 谷　小桃, YANO, Takayuki 矢野　孝幸, FUJIMOTO, Tatsuo 藤本　辰雄, TSUGE, Hiroshi 柘植　弘志, KAMEI, Kazuhito 亀井　一人, KUSUNOKI, Kazuhiko 楠　一彦, SEKI, Kazuaki 関　和明] 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 〒1008071 東京都千代田区丸の内二丁目６番１号 Tokyo1008071 The present invention provides a method for producing an SiC single crystal ingot which has a low density of threading screw dislocations from an early stage of growth by improving, relative to an increase in threading screw dislocations that occur near the interface between a seed crystal and a grown SiC single crystal, a reduction rate of the dislocation density which accompanies growth of the SiC single crystal. This method for producing a silicon carbide single crystal ingot grows the silicon carbide single crystal on a growth surface of the seed crystal comprising a silicon carbide single crystal by a sublimation recrystallization method, wherein step bunches having a step height of 10 μm to 1 mm and a terrace width of 200 μm to 1 mm are formed on the growth surface of the seed crystal in advance, afterwhich the silicon carbide single crystal is grown on the growth surface of the seed crystal by the sublimation recrystallization method.

[Yutaka Tani, Masao Nakano, Takayuki Ujifusa, Taichi Shintou, Kaoru Takahashi, Satoshi Saito, Takayuki Toyoda, Takeshi Miyazaki, Masashi Hirose] JP Yokohama-shi An object of the present invention is to provide a magenta toner having high dispersibility of a colorant and good spectral characteristics.A magenta toner includes a magenta toner particle including at least a binder resin, a compound represented by the formula (1), and a colorant, wherein the colorant includes a pigment having a quinacridone skeleton:(wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.)

[Taichi Shintou, Takayuki Ujifusa, Masao Nakano, Yutaka Tani, Kaoru Takahashi, Satoshi Saito, Takayuki Toyoda, Takeshi Miyazaki, Masashi Hirose] JP Saitama To provide a pigment dispersion excellent in dispersibility and spectral characteristics. The pigment dispersion at least includes: a dispersion medium; a compound represented by a general formula (1), the compound being dispersed in the dispersion medium; and a pigment having a quinacridone skeleton, the pigment being dispersed in the dispersion medium:in the general formula (1), R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.

[Taichi Shintou, Takayuki Ujifusa, Masao Nakano, Yutaka Tani, Kaoru Takahashi, Satoshi Saito, Takayuki Toyoda, Takeshi Miyazaki, Masashi Hirose] JP Saitama-shi To provide a pigment dispersion excellent in dispersibility and spectral characteristics. The pigment dispersion at least includes: a dispersion medium; a compound represented by a general formula (1), the compound being dispersed in the dispersion medium; and a pigment having a quinacridone skeleton, the pigment being dispersed in the dispersion medium:in the general formula (1), R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.

[TANI, Yutaka, NAKANO, Masao, UJIFUSA, Takayuki, SHINTOU, Taichi, TAKAHASHI, Kaoru, SAITO, Satoshi, TOYODA, Takayuki, MIYAZAKI, Takeshi, HIROSE, Masashi]

[SHINTOU, Taichi, UJIFUSA, Takayuki, NAKANO, Masao, TANI, Yutaka, TAKAHASHI, Kaoru, SAITO, Satoshi, TOYODA, Takayuki, MIYAZAKI, Takeshi, HIROSE, Masashi] 30-2 Shimomaruko 3-chome Ohta-ku, Tokyo 146-8501, JP

[TANI, Yutaka, NAKANO, Masao, UJIFUSA, Takayuki, SHINTOU, Taichi, TAKAHASHI, Kaoru, SAITO, Satoshi, TOYODA, Takayuki, MIYAZAKI, Takeshi, HIROSE, Masashi] 30-2 Shimomaruko 3-chome Ohta-ku, Tokyo 146-8501, JP

[TANI, Yutaka, NAKANO, Masao, UJIFUSA, Takayuki, SHINTOU, Taichi, TAKAHASHI, Kaoru, SAITO, Satoshi, TOYODA, Takayuki, MIYAZAKI, Takeshi, HIROSE, Masashi] 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501;c/o CANON KABUSHIKI KAISHA, 30-2, Shimomaruko 3-chome, Ohta-ku, Tokyo 1468501 An object of the present invention is to provide a magenta toner having high dispersibility of a colorant and good spectral characteristics. A magenta toner includes a magenta toner particle including at least a binder resin, a compound represented by the formula (1), and a colorant, wherein the colorant includes a pigment having a quinacridone skeleton: Formula (1) (wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.)

[Yutaka Tani, Masao Nakano, Takayuki Ujifusa, Taichi Shintou, Kaoru Takahashi, Satoshi Saito, Takayuki Toyoda, Takeshi Miyazaki, Masashi Hirose] JP Yokohama An object of the present invention is to provide a magenta toner having high dispersibility of a colorant and good spectral characteristics.A magenta toner includes a magenta toner particle including at least a binder resin, a compound represented by the formula (1), and a colorant, wherein the colorant includes a pigment having a quinacridone skeleton:(wherein R1 and R2 each independently represent a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group.)

[SHINTOU, Taichi, UJIFUSA, Takayuki, NAKANO, Masao, TANI, Yutaka, TAKAHASHI, Kaoru, SAITO, Satoshi, TOYODA, Takayuki, MIYAZAKI, Takeshi, HIROSE, Masashi] 30-2 Shimomaruko 3-chome Ohta-ku, Tokyo 146-8501, JP