I recently (with some of my last remaining $$s for the month ) purchased a platinum toning kit for POP paper. I just toned my first 7x17 Van Dyke print. Gorgeous. What an astounding result to the semi familiar Van Dyke process. Its not in the least bit steering me away from Van dyke printing. Quite the contrary. what a wonderful way to create a wonderous result to an already wonderous printing process. I am excited to play with it more. prints are washing right now. Made a straight van dyke and a Pt toned one to compare the final results. just thought Id share for anyone interested. The formula I used in the toning bath. 10grams Citric Acid 10 drops of 3% Pt to 1000ml (1litre) of distilled water. I toned for approximately 1min. then fixed and washed.