| 摘要 |
PROBLEM TO BE SOLVED: To obtain the photothermoconversion material good in sensitivity to laser beams and high in photothermoconversion efficiency and easy in processing for various kinds of uses by using a naphthalocyanine compound specified in structure as the photothermoconversion material. SOLUTION: This photothermoconversion material contains the naphthalocyanine compound represented by the formula in which each of A<1> -A<24> is, independently, an H or halogen atom; and M is 2 H atoms, a divalent metal, a trivalent metal derivative, or a tetravalent metal derivative. This photothermoconversion material has high sensitivity to semiconductor laser beams having a light emission region of near infrared rays (750 nm-1000 nm), and a high photothermoconversion efficiency, and so, it can be used for various kinds of uses. This naphthalocyanine compound is especially adapted to manufacture of the photothermoconversion layer of the photothermoconversion material for directly forming a lithographic printing plate by incorporating this compound in various kinds of binder resins to be used for these purposes. |
