Process for removing aldehyde from dispersions of microcapsules

A process for removing an aldehyde from a liquid dispersion of microcapsules with use of an aldehyde to form the wall-forming film of the capsules characterized in that:

• the microcapsules are formed of a wall-forming film of an aldehyde polycondensation resin produced in the presence of an acid catalyst in a liquid,
• a gas is introduced into the liquid dispersion following complete formation of the microcapsules;
• the liquid dispersion has a protective colloid incorporated therein before the gas is introduced thereinto, and
• the liquid dispersion is heated to a temperature of at least 50.degree. C. before the gas is introduced thereinto.