It is disclosed a method of mixing a liquid composition, wherein said liquid composition comprises microparticles dispersed in an aqueous liquid carrier and wherein said liquid composition is contained in a receptacle having a longitudinal axis, the method comprising: a first premixing step in which the receptacle is oscillated about said longitudinal axis clockwise and counter-clockwise from a first reference point through a first angle of rotation for a first period of time and at a first angular velocity； a second premixing step in which the receptacle is oscillated about said longitudinal axis clockwise and counter-clockwise from a second reference point through a second angle of rotation for a second period of time and at a second angular velocity； and wherein said first angle of rotation is smaller than said second angle of rotation, and said first period of time is shorter than said second period of time. Also disclosed is a device for mixing a liquid composition.
