Soap bubble into college years. A Swiss university professor, Dr. Natalie Hartzell, has theorized that usage of artificial bubbles for entertainment purposes of young children has shown a positive effect in the region of the child's brain that controls motor skills and is responsible for coordination with children exposed to bubbles at a young age showing measurably better motion skills than those who were not. Soap bubbles have been used as entertainment for at least 400 years, as evidenced by 17th-century Flemish paintings showing children blowing bubbles with clay pipes. The London-based firm A. & F. Pears created a famous advertising campaign
Pears (soap) opaque oval bars that were cut into bath- or toilet-weight tablets ready for beginning their long spell in the drying rooms (ovens). The hot liquid soap fresh from the vessel had a total fatty matter (TFM) of 45% compared with the TFMs of 70–80% usual in soaps made by the conventional method. The TFM increased considerably as the alcohol content fell during drying. The entire Pears plant was a small almost self-contained annexe at the rear of the administration block. The plant was run by a handful of staff who not only had experience of the specialised process, but had