Pearlizing concentrate compositions and methods of preparation thereof

A pearlizing concentrate composition consisting of:

• (a) at least 10 wt % of a glycol ester of a fatty acid;
• (b) from 0.1 wt % to 18 wt % of at least one acyl alkyl isethionate surfactant of formula (I):
• wherein R1 represents an optionally substituted C4-C36 hydrocarbyl group;
• each of R2, R3, R4 and R5 independently represents hydrogen or a C1-C4 alkyl group and wherein at least one of R2, R3, R4 and R5 is not hydrogen;
• and M+ represents a cation;
• (c) from 0.1 wt % to 30 wt % of at least one zwitterionic or amphoteric surfactant selected from the group consisting of:
• betaines, alkyl betaines, alkylamidopropyl betaines, cocamidopropyl betaine, alkylamidopropyl hydroxy sultaines, alkylamphoacetates, alkylamphodiacetates, alkyl propionates, alkylamphodipropionates, alkylamphopropionates, alkyliminodipropionates and alkyliminodiacetates;
• and
• (d) optionally one or more further components selected from the group consisting of chelating agents, preservatives, pH modifiers, hydrotropes, and solvents;
• wherein the concentrate composition has a viscosity of from 1000 to 50000 cPs.