Soap bubble for its soaps in 1886 using a painting by John Everett Millais of a child playing with bubbles. The Chicago company Chemtoy began selling bubble solution in the 1940s, and bubble solution has been popular with children ever since. According to one industry estimate, retailers sell around 200 million bottles annually. A bubble is made of transparent water enclosing transparent air. However the soap film is as thin as the visible light wavelength, resulting in interferences. This creates iridescence which, together with the bubble's spherical shape and fragility, contributes to its magical effect on children and adults alike. Each colour
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