Ok if I understand you correctly I must use the dark mask and set the shadow tolerance to 0. Do I leave everything else as before?.
If I load a psd file that has been rasterised into the forever rip do I use the same dark mask with the 0 shadow tolerance?

Am I correct in saying the forever dark has better washability then the forever light or am I just doing something wrong?
I have the Oki 8432wt printer and use the forever rip with a stahls fusion press. I was told that I am not pressing with enough pressure I press at the exact pressure that forever recommend. I did go up a little but did not change the washability was not as good as the laser dark?

I will try the settings you suggested today and see how they go. Thank you very much for your reply and help.

Kind Regards