I disagree. I think people need to learn the basics about how variable contrast papers "see" filtered light before splitting their base exposure into a hard and soft. Otherwise they're just guessing at a more complex gimmick. The confusion in virtually every "split-grade" thread posted by inexperienced printers is evidence of this. Ilford has a very good on-line publication about filtration and contrast control with variable contrast papers. It is also worth reminding everyone "split-grade" is nothing more than a specific case of multiple grade or variable contrast printing.
Originally Posted by MattKing