Can anyone speak to this product and how it preforms with variable contrast filters. I'd be comparing it to Ilford Multigrade Warmtone FB under a cold light with variable contrast filters. I have some of Rockland's Ag-Plus waiting to be tested but I've become interested in Liquid Light VC as a possible way of making single weight paper for paper inter-positives and inter-negatives for printing. Can anyone give a straight forward review and comparison? Thank you.