Radiation-curable compositions of pigment violet 23 with improved removability from surfaces, method of making a radiation-curable composition and ink containing a radiation-curable composition

A method for producing a radiation-curable composition, which comprises the steps of:

• i) providing at least one Pigment Violet 23 containing at least one functional group of the formula (I):
• —X-E (I)
• where:
• X is a bridging group;
• and
• E is a polar molecule radical;
• and
• ii) dispersing the at least one Pigment Violet 23 in a nonaqueous dispersion medium, using at least one dispersant.

An ink for inkjet printing, containing:

• a radiation-curable composition, containing:
• a) at least one Pigment Violet 23, containing at least one functional group of formula (I)
• —X-E (I)
• where:
• X is a bridging group;
• and
• E is a polar molecule radical;
• b) at least one dispersant;
• and
• c) a nonaqueous dispersion medium.