I've always used the old tracing paper method to transfer my drawings to the linoleum. I've seen techniques where one uses a toner based laser print, and a xylene pen to transfer the toner to the linoleum. I tried this once, but I don't think I burnished hard enough. Not to mention, that pen was awful smelling and probably harmful to my health.
I also saw where someone used vinegar to transfer an ink jet printed image. This slightly worked, but not enough to have solid lines to follow. I was left back to my usual way of using the tracing paper, but my block smelled like a pickle.
I suppose I could use carbon paper to transfer as well. I want a more precise method though, so I can have high tolerances for multi colored, multi plate prints.
I was thinking of either an ink jet iron on transfer, which could get messy. Otherwise, I was thinking of using a photo resist used in screen printing, which also could get messy.
What are your methods? Any thoughts?