by weight of triethylene glycol n butyl ether as water soluble polyvalent alcohol alkyl ether and 62 by weight of pure water the obtained black and yellow inks were used in combination for a water base ink set for ink jet recording a black ink was prepared by mixing and agitating 30 by weight of cab o jet 300 manufactured by cabot solid content 15 by weight as self dispersing black pigment 28 by weight of glycerol 1 by weight of triethylene glycol n butyl ether as water soluble polyvalent alcohol alkyl ether and 41 by weight of pure water a yellow ink was prepared by mixing and agitating 3 by weight of c i acid yellow 23 number of counter ions per one molecule 3 as water soluble yellow dye 30 by weight of glycerol 0 2 by weight of ethomeen c 25 manufactured by lion akzo co ltd r c 8 to 18 x y 15 in the foregoing general formula 1 as surfactant based on amine 1 by weight of triethylene glycol n butyl ether as water soluble polyvalent alcohol alkyl ether and 65 8 by weight of pure water the obtained black and yellow inks were used in combination for a water base ink set for ink jet recording a black ink was prepared by mixing and agitating 30 by weight of cab o jet 300 manufactured by cabot solid content 15 by weight as self dispersing black pigment 28 by weight of glycerol 1 by weight of triethylene glycol n butyl ether as water soluble polyvalent alcohol alkyl ether and 41 by weight of pure water a yellow ink was prepared by mixing and agitating 3 by weight of c i.