| 摘要 |
PROBLEM TO BE SOLVED: To provide a lamp bulb having high visibility by directly coloring the lamp bulb, showing a stable luminescent characteristic against heat generation in lighting the lamp, having excellent adhesiveness of a coloring film, excellent in solvent resistance and durability, and displaying a bright amber color. SOLUTION: This colorant prepared by mixing (A) iron oxide fine particles each having a diameter of 1-100 nm, (B) silver fine particles each having a diameter of 1-30 nm, (C) an organic silicon compound, (D) at least one kind of organic metal compound containing a metal selected from titanium, zirconia, tin, iron and nickel, (E) a binder resin and (F) an organic solvent is applied to a transparent and colorless lamp bulb surface, dried and thereafter baked to form a colored film. In this case, the mixing ratio of (A) iron oxide fine particles to (B) silver fine particles is 50:1-1:1 by a mass ratio. COPYRIGHT: (C)2004,JPO
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