I'm using Paintshop Pro 7.04. I've got some large (8x10 inch, 300 dpi) black-and-white images that I am trying to save as TIF files. After all my fine, anal work getting the tonality of the images just right, I save them to TIF and they appear darker and a bit blotchy -- rather like the contrast has been turned up a bit on them, and like their resolution is lower (it's not). Also, they lose some of their shades of gray: one dropped from 1571 in PSP to only 1500 in the TIF. Another went from 256 to 200. A third went from 256 to 221.
I thought TIF was a "lossless" compression, but I've lost colors as well as quality. What gives? They were saved with LZW compression, CMYK color channels.