Sunsilk was launched in the UK in 1954, and by 1959 it was available in 18 different countries worldwide. At the time, Sunsilk had an advantage over other shampoos in the market as it only needed one application, and so meant washing less natural oils from the hair. Sunsilk cream shampoo for dry hair was launched in 1956.
In 1958, a new transparent polythene tube for the liquid shampoo was introduced as an alternative large size pack to the bottle. Sunsilk was also available in such tubes.
In 1960, Sunsilk Tonic shampoo was launched, containing skin healing ingredient Allantoin – designed to help keep the scalp free from infection.
In 1961, Sunsilk Liquid shampoo was re-launched to Sunsilk Beauty, because ‘Liquid’ in the name, originally used to distinguish the product from powdered shampoos had become meaningless as the majority of shampoos were now in liquid form.
Info gleaned from Wikipedia