The best way to ensure clear prints from your woodblocks is to clean your equipment. The lines on the block must be cleared of ink dried between them and ink applied to the printing surface should be delivered in a smooth, even film from a clean roller. Excessive or goopy ink will blur those fine lines carved with such eye searing care. This afternoon I noticed a roller left in a pool of clear gel (I forgot 'cause I didn't see it) and the raised pattern of dried gel rendered this roller all but useless. I use polymers rather than oils now, so I figured a good soak in alcohol would loosen the build-up. I keep a leftover bottle of Zelco under the sink with the rest of the cleaning supplies. As a publican, I used to buy this stuff at 1.80 for three quarters of a litre.
The layers of polymer peeled off the pink rubber after a bit, and the roller delivered crisper prints. I've had my eye glasses cleaned with cheap vodka by a kindly bartender, I've seen it used to clean car battery contacts, some people have used it to disinfect wounds but this is the first time I've actually used it to peel paint. Think about that before you order that rail drink tonight, folks and have a happy weekend!