Probably only worth doing if you want to figure out exactly which settings to use on your colour head to precisely duplicate the effect of each of your Ilford filters. Not sure I'd bother with that unless your process for exposing and developing negatives was already calibrated to the Ilford filters. Based on the first part of your post, that does not appear to be the case. So if you want to switch from the Ilford filters to using your colour head (yellow and magenta), you can download Ilford's recommended magenta and yellow settings, use them as approximations and go from there.
The problem of insufficient contrast is another matter, and will not be solved by moving to using the colour head. If you find yourself always needing high contrast filters, first do some darkroom tests for things like safelight fog or enlarger light leaks, make sure your filters aren't faded, etc. If everything checks out and your paper and developer are fresh, then you're simply not getting enough contrast in your negatives. Try increasing negative development time. Monitor temperatures. Make sure you are agitating enough etc.
If you increase the contrast in your negatives you won't need to resort to using high contrast printing filters all the time.
Last edited by Michael R 1974; 12-27-2012 at 01:03 PM. Click to view previous post history.