Sanyo Color Works, Ltd.

Toshiyuki Miki

Mitsumasa Takeya

The present invention relates to a easily dispersible pigment composition for non-aqueous vehicles, comprising 100 wt. parts of organic pigment or inorganic pigment and 0.5-15 wt. parts of tetracarboxylic acid diimid compound having the following formula [I], and a method for dispersing pigment in non-aqueous vehicle, comprising use of 0.5-15 wt. parts of the compound having the following formula [I] against 100 wt. parts of organic or inorganic pigment. ##STR1## In the formula [I], Q shows naphthaline radical or perylene radical having 4 carbonyl radicals at peri-positions and R.sup.1 and R.sup.2 show either the same or differently hydrogen atom or alkyl radical having 1-2 carbon atoms, and n is 2 or 3.

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Himeji, Japan

Toshiyuki Miki