Normally, 2-6% perfume, colour, skin protecting agents and other additions are to be mixed as equally as possible with the dried base soap formed as noodles or chips.
In case of throughputs up to 2,000 kg/hr, discontinuous mixers are economic where a time of 6-15 minutes is needed for each batch and the material is mixed in a mixing trough by rotating mixing arms.
For normal mixture of toilet soaps SELA TM-B mixers with one mixer shaft are used. The mixer is emptied through an outlet in the bottom that can be opened or closed by motor.
In case of base soap noodles with high bulk density and great share of liquid or pasty additions a kneading effect is necessary additionally. For this, SELA TKH kneaders with two kneading elements are used. This system is emptied by tilting the trough.