Re: uneven inking + migrating!!
- not sure what kind of trucks: they are white plastic. i don't have a roller height gauge
(need to get one). my base is a deep relief, as is the type of plate. the rollers are leaving a
stripe on the ink disk.
HOWEVER! i tried the paper behind the chase and voila. the problem still occurs, but less
frequently and much less severly. thanks for pointing me in the right direction and for the
--- In PPLetterpress@yahoogroups.com, Gary Mordhorst <gary@...> wrote:
> What type of roller trucks are you using. If they are Merts, the
> trucks are out of round. If the trucks are solid, there may bee too
> much space between your plate and the rollers.
> To check the ink disk to roller contact, run the rollers onto the ink
> disk and let them set for a moment, then either roll the rollers back,
> or physically lift them to see if there is a "stripe" where the rollers
> were on the disk.
> Be sure that the height of your base and the height of your plate add
> up to 0.918". If you are using a deep relief base (red grid lines)
> and a shallow plate, the combined height of these two will not reach
> the rollers. Do a test by placing a sheet of 80# cover weight paper
> behind the chase (between the press bed and the chase) to see if this
> improves roller contact. If so, it is likely that your rollers are old
> and have shrunk, or your plate and base are miss-matched.
> Best of luck,
> Gary Mordhorst
> AccuColor Plus, Inc.
> (773) 227-7788
> Conventional offset Digital offset Contemporary
> On Jul 26, 2006, at 1:01 PM, melwood313 wrote:
> > printing on arturo mould-made paper, using van son rubber-based ink,
> > clean-up +
> > deglaze with easy street + glaze off. using boxcar base and
> > photopolymer plate. once i get
> > everything up and running (i am so new to this AND self-taught) my
> > plate inks in one area
> > while the other doesn't ink at all. then the situation reverses.
> > hence the migrating. the guy
> > i bought the press from (golding pearl improved) told me to put a
> > thin washer under the
> > ink disc... i tried that with some thin plastic. not helping. i am
> > still thinking ink disc.
> > any suggestions/comments/HELP! i've got to ship this job by monday.
> > thanks in advance.