Pigment Preparation Based on Diketopyrrolopyrroles

1) A pigment preparation comprising C.I. Pigment Red 254 having an average particle size d50 of 20 to 100 nm and at least one pigment dispersant of the formula (II)

• wherein
• s is a number from 1 to 5;
• n is a number from 0 to 4;
• the sum of s and n being 1 to 5;
• R3 is phenyl-NR5R6, phenyl-COO−E+, phenyl-SO3−E+, C1-C6 alkyl-NR5R6, C1-C6 alkyl-SO3−E+ or C1-C6 alkyl-COO−E+, with R5 and R6 being the same or different and are hydrogen, phenyl or C1-C6 alkyl;
• R4 is hydrogen, C1-C6 alkyl, benzyl or phenyl,
• E+, G+ independently of one another are hydrogen, an alkaline earth metal, an alkali metal or a metal from main group three.