| 摘要 |
PROBLEM TO BE SOLVED: To obtain an ink composition which can be applied on a substrate to be written on from a writing tool or a printing apparatus, can also contain various chemicals, shows an improved abrasion resistance and can give a clearly improved writing or printing length by blending a pigment or a pigment mixture as an effective component. SOLUTION: A pigment to be used contains a carbon black dispersion pigment such as a color black, a furnace black, a gas black, a flame black or the like, a color organic pigment of an azo or phthalocyanine type or the like or a mixture of these pigments. More than 0.001 wt.%, based on the whole weight of the ink composition, of an abrasion reducing additive whose average particle size is 10-500 nm is used Preferably, the abrasion reducing additive contains a gas black whose primary particles have an average size of 10-30 nm, a furnace black whose primary particles have an average size of 10-20 nm, and/or a flame black whose primary particles have an average size of about 100 nm. |
