The inky rubbery kind!
Have you tried making your own stamps?
I thought it would be fun to try when I saw someone offering a stamp carving workshop, unfortunately I can't get to the workshop (it's too far away) but I wondered how hard it would be to do it yourself.
|handcarved stamped cards|
It looks easy enough - you just need the right tools.
You can make small stamps from good quality erasers and you need something like a craft knife or lino cutting tool to cut the design.
If you need inspiration - or another how-to, check out Gennine's blog.
So many sweet ideas.