Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Nippon Steel Sumitomo Metal Corporation

Ukima Colour & Chemicals Mfg. Co., Ltd.

Keiji Nakajima

Takashi Maeda

Michiei Nakamura

Mitsuharu Yonemura

Yukio Kanbara

Tsuneaki Nagamichi

Yasuhiro Maehara

Masayuki Takahashi

Hiroyuki Shimanaka

Shigeru Sakamoto

Mitsuo Yamazaki

Akira Nishio

Shotoku Takami

Shigeru Takarada

Kazuo Kanou

Kazutaka Aoki

Masanori Takakamo

Takamitsu Shinoda

Masahiko Aoba

Motohisa Maruyama

Hiroyoshi Terada

Masayuki Kinnou

Chikamasa Nakamura

Kanako Sato

Toshiaki Anzai

A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450&#xb0; C., at a cooling rate of 0.5&#xb0; C./s or more. After the cooling, working in a temperature range of 600&#xb0; C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750&#xb0; C. are desirably performed. The working and the heat treatment are desirably performed a plurality of times.log&#x2264;0.4742+17.629&#xd7;exp(&#x2212;0.1133&#xd7;)&#x2003;&#x2003;(1)

Copper alloy and process for producing the same

A copper alloy consisting of two or more of Cr, Ti and Zr, and the balance Cu and impurities, in which the relationship between the total number N and the diameter X satisfies the following formula (1). Ag, P, Mg or the like may be included instead of a part of Cu. This copper alloy is obtained by cooling a bloom, a slab, a billet, or a ingot in at least in a temperature range from the bloom, the slab, the billet, or the ingot temperature just after casting to 450&#xb0; C., at a cooling rate of 0.5&#xb0; C./s or more. After the cooling, working in a temperature range of 600&#xb0; C. or lower and further heat treatment of holding for 30 seconds or more in a temperature range of 150 to 750&#xb0; C. are desirably performed. The working and the heat treatment are most desirably performed for a plurality of times.log&#x2264;0.4742+17.629&#xd7;exp(&#x2212;0.1133&#xd7;)&#x2003;&#x2003;(1)

A composite pigment of a bluish green color comprises copper phthalocyanine and aluminum phthalocyanine which are preferably in the form of a mixture or solid solution. The composite pigment can be produced by mixing copper phthalocyanine and aluminum phthalocyanine into a mixture and then converting said mixture into a pigment form. A coloring composition comprises at least a resin and a pigment which comprises copper phthalocyanine and aluminum phthalocyanine. The coloring composition can be produced by mixing copper phthalocyanine and aluminum phthalocyanine which have been independently comminuted, into a composite pigment, and then kneading the pigment and a resin such that the pigment is dispersed in the resin. An image recording substance is produced using the coloring composition. The image recording substance can be a dry developer of a fine powder form or a wet developer of a liquid form, an ink-jet ink, or a thermal transfer ink ribbon with the coloring composition coated on a film-shaped or sheet-shaped base material.

Composite pigments, coloring compositions, and image recording substances

A process is provided for producing a colored fine particulate composition by dissolving or dispersing a coloring matter or a coloring matter and charge control agent in a condensation-polymerized resin component and forming the resultant resin composition into fine particles. The coloring matter or the coloring matter and charge control agent are added to a raw material component for the production of the resin component, or to the resin component in a period from initiation to completion of polymerization of the resin component or while the resin component is in a molten state subsequent to the completion of the polymerization, whereby the coloring matter or the coloring matter and charge control agent are dissolved or dispersed in the resulting resin component. A colored composition obtained subsequent to the dissolution or the dispersion is cooled. The colored composition so cooled is then formed into fine particles.

Production process of colored fine particulate composition and colored fine particulate composition produced by the process

A composition for a black matrix is disclosed. The composition is composed of a black pigment and a binder for the pigment. The black pigment is a compound-oxide black pigment, which comprises at least two metal oxides and has a spinel or inverse-spinel crystalline structure. Also discloses are a process for the formation of a black matrix from the composition and an article provided with a black matrix so formed.

Composition for black matrix, fabrication process of black matrix and

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Tokyo, Japan

Keiji Nakajima