It is good to raise the zone placement of your negs a notch but if you have no detail in your shadows... your not going to have anything except a denser fog. It is almost grain free so it is alot better than silver intensifiers by a long shot which tend to get very grainy!!!! You don't want to do this on overdeveloped or overexposed by an means. If your negs are thin, make sure you pull a print and tone the print first to see if you like the look of this before you do permanent toning to the negs!(posted 8398 days ago)