Gasparcolor was the first three-color multi-layer monopack film available for practical use. It was a double-coated print film with a cyan layer on one side and two layers dyed magenta and yellow on the other side (see illustrations).
“In 1898 William Friese-Greene, a professional portrait photographer by trade, demonstrated in London ‘the first process of true natural-color cinematography.’ His program consisted of ‘a series of animated natural-color pictures,’ and although this demonstration aroused considerable interest at the time, Friese-Greene was unable to exploit this system on a profitable basis. Undaunted, he eventually developed a total of four different color methods.”