alternative process collage

a collage of some tests I did last week, when I started with a new batch of chemistry and also tested some new papers.
these are the first "working papers" or "reference prints", the ones I use to determine the exposure and development time.
to the left is a platinum/palladium print, top right a van dyke and lower right a coffee toned van dyke print.
all images on 300g/m² canson paper. the initial images used here were shot on polaroid, scanned and then converted to digital negatives.
I’m also giving a workshop in alternative process printing on June 11th. more info about the event and workshops on the link below:
http://www.vernontrent.com/2011/05/24/workshop-alternative-process-printing-auf-die-pirmasenser-fototage/ (german)