Process for producing coated bleach activator granules

A process for producing coated bleach activator granules, comprising

• (a) forming a mixture, comprising at least one bleach activator, a granulating auxiliary, and optionally other additives,
• (b) agglomerating said mixture into activator base granules,
• (c) coating said bleach activator base granules with a melt of coating substance having a softening or melting point of from 30° C. to 100° C., and
• (d) simultaneously and/or subsequent to said coating step (c), thermally conditioning the coated granules for approximately 1 to 180 minutes by heat treatment comprising maintaining said coated granules at a temperature of 30° C. to 100° C. wherein the temperature maintained during said thermal conditioning is a temperature below the melting or softening point of said coating substance, steps (c) and (d) occurring under mechanical mixing.