The other day I tried exposing VC paper using a circular blue camera filter (the one for exposing color film under tungsten), instead of the standard VC filter, and found out that using the highest grade magenta filter (intended for VC printing) gave slightly more contrast. I thought that 'blue' was the color needed for the highest contrast. Comments? - David Lyga
The 'blue' filter you used passes too much yellow to achieve the maximum contrast available from the paper. What is wrong with using the #5 VC filter?