I wish I had more inks that I could play with but at the moment I only have the green. These were printed on to a 400mic (around 300gsm) white pulb board. It prints beautifully and leaves a small but effective impression on the paper.
I have purposely left some of the letters out so that I could fill them in myself. I plan on merging letterpress and illustration/hand rendered typography. I would like to sell cards this way. maybe even sell some blank for those who are like minded, to fill in the gaps themselves.