Wall has a good discussion about sensitizing collodion emulsions with commercial dyes. His book, "The History of Three Color Photography" is available online--the collodion discussion starts about page 222. Here is the link:
There is also a book from 1905 by Oscar Klein which is also online, "Collodion Emulsion and its Applications..." which deals with making collodion emulsions color sensitive using common dyes. That link is:
In addition there are various Kodak publications from the 1920s which deal with sensitizing collodion, as I recall. Search the topic through Google Books.