摘要:
A colorant composition comprising a copper phthalocyanine pigment, a fluorescent dye, and a resin binder, wherein the hue angle of a coating from the composition on white paper is 236° or less, and the fluorescent material provides a maximum reflectance of 90 to 130% in the visible reflection spectrum of a coating film consisting of the fluorescent dye and the resin binder without comprising the copper phthalocyanine pigment.
摘要:
The invention provides a black pigment composition capable of overcoming the drawbacks of carbon black pigments, which, when used as a toner colorant in particular, is able to reduce color shading over time and improve image qualities through an improvement in charging performances such as charge leakage and the like. The invention also provides a chromatic pigment composition able to reduce and correct the tinge of a carbon black pigment while improving fading stability, when the composition is added to a carbon black composition for electrophotographic toners. The black pigment composition contains, as essential pigments, a pigment P1 having a maximum absorption wavelength λ max (nm) within the range of 460 ≤λ max ≤ 530 and a half-value wavelength (long wavelength side) of the absorption spectrum of 550 nm or more, and a pigment P2 having a maximum absorption wavelength λ max (nm) within the range of 600 ≤ λ max ≤ 700, as measured in the form of a dispersion in a solvent (methyl ethyl ketone).
摘要:
Provided is a pigment combination exhibiting excellent electrical properties including electrical insulating properties and environmental safety, and having a hue close to that of carbon black and giving a high coloring strength. The invention provides a pigment composition containing a plurality of organic pigments P1 and P2 as essential components and optionally further containing a third pigment P3, wherein the first pigment P1 is at least one phthalocyanine pigment, the second pigment P2 is at least one pigment selected from perylene pigments, azo pigments, perinone pigments, quinacridone pigments, and anthraquinone pigments, and each of the organic pigments P1, P2, and P3 is a pigment which contains no halogen in its molecular structure.