Several years ago, I tested out different dilutions of the LPD on Ilford warmtone paper, and though the differences were quite obvious in person from 1:1 dilution to 1:5, it was harder to discern a difference when I scanned the prints. Just a little too subtle for the scanner. It's a great all purpose developer, and since it comes in a powder form it doesn't cost as much to ship, highly recommended.