You have to develop only once.
You don't need any copying frame.
No negative - no more prints, every single picture is unique item.
You get it mirrored (left-right swapped).
It would be interesting to reverse develop ordinary paper, but for sure someone has already tried...
This is good to know. I've previously tried Harman DPP at EI 6 and developed in Ilford Multigrade, but got an overly pinkish image that was light grey and lacked contrast.
Because variety is the spice of life.
Try preflashing it improves the speed and better contrast, also look good when selenium toned
I just posted some spectral response curves for various filter colors when used on Harmon DP papers over at LFPF:
looks about rightif you like less contrast, use a diffusion filter for a pre flash and/orvery soft lightand/orhighly diluted developer and always a yellow#8 FILTER AT EI3.of course regular paperinversed through contact printing(aka paper negatives )works too.
I have two boxes of Harman DPP waiting to be loaded. The great thing (for me) is that the paper can be ordered inexpensively from Harman shop directly. Their shipping costs are modest too.
Take care of that paper! Keep it in the fridge or freezer. I loaded my last 2 sheets in a film holder last spring or summer. With family and health issues I lost track of it and just re-discovered it. Shot them both and developed in fresh developer. Even mid tone gray across both sheets........