Self-dispersing capsules

A method for manufacturing capsules for an inkjet ink, the method comprising the steps of:

• a) preparing a non-aqueous solution of a first shell component of a polymeric shell and one or more chemical reactants, optionally in an organic solvent having a low miscibility with water and having a lower boiling point than water;
• b) preparing an aqueous solution of a second shell component of the polymeric shell and an amphoteric surfactant;
• c) dispersing the non-aqueous solution under shear in the aqueous solution;
• d) optionally stripping the organic solvent from a mixture of the aqueous solution and the non-aqueous solution;
• and
• e) preparing the polymeric shell around the one or more chemical reactants by interfacial polymerization of the first shell component and the second shell component of the polymeric shell;
• wherein
• the amphoteric surfactant consists of 85% to 100% of a surfactant according to Formula (I):
• R represents an optionally substituted aliphatic chain including 8 to 22 carbon atoms, wherein optionally substituted means substituted by a hydroxyl group, a halogen, an ether group including 1 to 6 carbon atoms, an amide group including 1 to 6 carbon atoms, an alkyl group including 1 to 6 carbon atoms, and an aryl group including 1 to 8 carbon atoms;
• L represents a divalent linking group including 1 to 6 carbon atoms;
• and
• M+represents a proton or a counterion to compensate for a negative charge of the carboxylate group.