My wife has developed some mastery of this process, and will be producing a significant number of gravures for a show in April. Her blog isn't current, but will become so as she works toward this show. Hers is a hybrid process using a digitally enlarged negative which makes it unsuitable for apug directly, but if you're interested, the link is below. It is anything but simple, however, and requires a good deal of skill in printmaking (as well has owning, or having access to an intaglio press). But, the results can be exquisite, and it is a procedure well worth the effort.