Very nice web site and well organized and presented.
Some of the data is speculation, and this is stated on the web site. The information given as speculation is actually incorrect in some cases and correct in others simply from the lack of published information. There are many details missing.
For example, there are probably over 14 variations in color paper from its inception at EK until the present day. There were many more processes and process variations than are indicated, including the change from CD2 to CD3, the change from a quinone bleach to a ferricyanide bleach and then the change to a blix.
So, the site is excellent as an overview or outline, but one must be aware of the gaps and the speculation.
I have outlined the history of color paper in another thread here.