To anyone who is interested in the history of Photography, mainly regarding colour photography, have a look at this site.
History of Ilford Ltd,
The beginnings of Kodacolor and Ektacolor negative films and the early processing and printing of Kodacolor.
The Pavelle colour print kits as were sold in the U.K. in the 1960s and other Paterson products.
Some info on very early Agfacolor,
Johnsons of Hendon and Phototechnology plus short histories of many other companies involved in early colour photography and colour printing.
This is an excellent site, with a mine of information on it. Very easy to find your way around the site and many good photographs of early materials/products to see.
then click on "photographic memorabilia"