Digital BW, The Print

The prints I make with this VM-Inks use to be a little darker then in the
monitor. So,comparing a print to the image on the screen,I made a curve that
brings the monitor image closer to the printed image,and saved it. Now,I
can\ufffdt find the best way to use it in an image I'm ready to print...load it
only of course is wrong,it will print even darker...there's no "invert
curves effect" command... got stuck with this.Sure the answer is simple,it
just does not come to me.Any ideas?
Andr\ufffd