bunting bases & plate creep
>Jerry. I too had the creeping problem with a bunting base on the KSBA. IGaylord, I use the Bunting bases for the bulk of my jobbing work, but use a
>wonder what Brad Hutchenson uses. Gaylor.d
"butt bar" as Gerry describes to help limit plate creep. The main virtue of
the Bunting base, in my opinion, is its solidity and machined precision
more than the strength of its grip. I use a large Patmag for book work,
but the top layer of soft magnetic material will compress under heavy
impression and create a halo effect in the larger point sizes of type so
it is less useful for general job printing. Books require less impression
and the smaller point sizes don't sink into the softer magnetic material,
so the Patmag works fine for books. For both bases I find that a light
misting of spray mount on the back of the plate is enough to keep it from
moving, except for jobs that require Very Heavy impression--like most of
the graphic designers prefer these days.
Something about plate creep I don't understand: without the aforementioned
butt bar (mine is a piece of steel rule ground down just below type high)
the plate will creep toward the grippers, but with the butt bar in place to
limit movement in that direction the plate will then start to creep in the
opposite direction. It seems like the plate would be inclined to move in
only one direction due to the pressue of impression. Any ideas?
Austin, Texas 78722
- Bradley - The reason the plate creeps away from the butt bar can be explained
by Isaac Newton's famous third law of motion: 'Every action has an equal and
As the plate is pushed against the bar the re-action pushes it away.