Is printing pure platinum more difficult than Pt/Pd or pure palladium? And if so, in what way? I've tried it once but hardly got any picture at all. I used the same time, same mixture (except for exchanging the Pl for Pt). Since this is expensive drops I don't feel like wildly experimenting until I know a little bit more. PS: If a platinum print is a platinotype does that make a palladium print a palladiotype?