Quote Originally Posted by Q.G. View Post
I don't think that's correct.
It was because the thingy produced colour pictures, rather than monochrome.

Monochrome film that gave/gives a full chromatic response also exist, and the fact that they produce a full chromatic response is denoted by the prefix "pan".
It is correct, but many early monochrome films had poorer red sensitivity, but they were fully chromatic in the case of Verichrome etc. Remember that Kodak made Verichrome right into the mid 1950's before introducing Verichrome Pan, many people preferred the look and feel of films like Verichrome it was particularly good for portraits. Adox/EFKE 25 is the closest in response to these older films.

Orthochromatic means not sensitive to the red end of the spectrum, athough the degree can vary.

Panchromatic means increased red sensitivity over films like Verichrome, Selochrome etc, Wratten & Wainwright also made Panchromatic plates before 1910, so did Lumiere.

Ian