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) that Pears would not abandon the new formula but "make further improvements, by delivering a scent that more closely resembles" the original formula. Home makers of soap have made soaps using the original eight components of Pears soap. An analysis of the current ingredients list reveals items such as limonene, whose variant called limonene is characterised by a "turpentine-like odour" also typical of frankincense. It is an insecticide as well. However, this item was present in the pre-2009 formula, so the perceived change might be explained by different ingredients and by different proportions of ingredients. The latest 2009 modification mainly