Patent ID: 7578876
Filing Date: 2009-08-25
Classification: C09D

Abstract:
1. An aqueous ink comprising at least water, a water-soluble organic solvent and carbon black particles, the carbon black particles including carbon black particles having a particle size of 0.5 μm or more, wherein a proportion made up by the volume of carbon black particles having a particle size of 0.2 μm or more and less than 0.5 μm is 0.3% or less based on the total volume of all the carbon black particles in the aqueous ink, a number of carbon black particles having a particle size of 0.5 μm or more and less than 5.0 μm is 1.0×10 an average particle size value of the carbon black particles is from 0.060 μm or more to 0.130 μm or less.