Quote Originally Posted by MattKing View Post
Blue, if you have a source of light with no inherent green (e.g. a later version Ilford 500 head).

Magenta, if your light source is more typical.

Magenta with more typical light source is easy to work with.
Matt, not quite sure what you mean by typical (mudying the water here)? Have you done a practical test of blue v magenta?