In the industrial production of foam baths, starting materials with different properties combine to provide a stable, effective starting substance in the course of production. The basis of most foam baths is an oil-water mixture that is stably distributed by means of emulsifiers, such as lecithin, fatty alcohols, lactic acid esters or glycerol-laurate. In the case of high water content, thickeners, gelling agents and similar auxilliary substances, such as xanthan, cellulose, alginate and polyglycerol ester, are also added to produce a pleasant viscous basis. The cleansing effect comes from tensides, which are mixed into the foam baths. An important factor is the regulation of the pH-value in the range around 5.5.
Foam baths require a highly-efficient, multi-stage production process. With an extensive range of equipment and optional accessories, modern homogenising mixers can ensure optimal processes in the production of foam baths if correctly designed. By sucking in of water and fat phases by the Hot/Cold Process, direct combination of the phases in the highest shear range of the dispersion machine can be achieved. In this way, a stable emulsion can be produced, whereby all components of the end product can be combined shortly before filling.
A pressure and vacuum-proof machine design prevents air from being worked into the mixture. A scraping system that is independent of the direction of rotation in combination with vertical and horizontal mixing agitators achieves an optimal mixing of highly viscous substances. An In-Process pH-value monitoring device can further reduce the batch time. Aseptic GMP design of the plants and a rotating CIP-System under the lid of the homogenising mixer must ensure germ-free production processes and guarantee compliance with all hygiene regulations in the production of foam baths.