A process for preparing modified particulate solid materials and inks comprising the same

Including being a manufacturing process of a property modification granular solid, and making a dispersing agent and a compound react under existence of a granular solid and a fluid medium, the a above-mentioned dispersing agent, It is a manufacturing process which has at least one reactant machine chosen from ケト, aldehyde, and a beta * ジケト ester group, and is characterized by the; b above-mentioned compound having at least two bases which have reactivity to the above-mentioned ケト, aldehyde, and/or a beta * ジケト ester group. This manufacturing process offers the property modification granular solid which has the improved stability. This property modification granular solid is useful to especially combination in liquid ビヒクル which has various polarity, and the ink for ink jet printings.