Rinso

Rinso is the brand name of a laundry soap marketed by Unilever. It is used in Australia, Indonesia, Chile, New Zealand, Ireland, the United Kingdom and the United States. The brand was created by Robert S Hudson and originally branded Hudson's Soap, which was sold to Lever Brothers of Port Sunlight, England, in 1908. It was also manufactured by the Lever Brothers Company (later known as Unilever) in the United States, starting in 1918.

Rinso was one of the first mass-marketed soap powders. It was advertised widely on United States radio, being the sponsor of many radio programs such as the popular daytime soap opera Big Sister from 1936 to 1946, the dramatic anthology Grand Central Station from 1940 to 1942, the night-time programs Big Town from 1937 to 1942, Mayor of the Town from 1942 to 1943, and most notably The Amos 'n' Andy Show from 1943 to 1950. During this time the product's advertisements happily chanted the slogan "Rinso white, Rinso bright" and boasted that Rinso contained "Solium, the sunlight ingredient".

The product's claim to better rinsing was due to its incorporation of sodium silicate as a builder rather than, or in addition to, the more commonly used sodium carbonate. The precipitate formed by metasilicate and calcium tends to be finer and hence less likely to be trapped in cloth than the chalky calcium carbonate.

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