Re: PPWeirdness (dampening follow up)
Don't know that the other concern was in reference to you, but you
might even want to back down to 4 minutes on washout for the Toyobo
152s. It 'll leave a bit of residue and not look as nice as one might
hope, but it will definitely prevent undercutting and ensure support.
These are steel-backs. Don't know about the polyester-backed 152s.
The Toybobo 95s are a dream plate. Perfectly clean at 3.5 minute
washout, no residue, no undercutting, steel- or polyester-backed.
--- In PPLetterpress@yahoogroups.com, Peter Fraterdeus <peterf@...> wrote:
> Bryan, Gerald,
> Dampening worked well on the 300gsm Lettra
> Assuming one is doing single color work, variation in grain doesn't
> really come into it.
> Also, even with multiple colors, keeping the stock lightly wrapped
> between impressions will minimize dimensional variation.
> Double ply, 600gsm, I can imagine may be a problem on the cylinder,
> As far as the other concern that Gerald alludes to, the plate in
> question was neither of the Toyobos, but a leftover that was acquired
> previously. I've had none of these problems with the Toyobo 152. One
> thing is that I've found that keeping the washout to the absolute
> minimum is critical, and often pull the plate while there are still
> small amounts of material adhering to the backing. (about 4.5 minutes)
> With this, I get lovely shoulders on even isolated thin rules and
> My concern had nothing to do with "bulging" between the letters, but
> the fact that there was so little definition between the letters, so
> that the whole line of type appeared to be surrounded by a slight
> depression caused by very shallow shoulders. With the Toyobo (either
> 95 or 152) I've not had this problem. While the impression was not
> wimpy, neither was it excessive. There is never embossing on the verso.
> On 8 May 2008, at 6:43 PM, kringds wrote:
> > Hi Gerald,
> > I was browsing the archives on dampening paper and came across your
> > post below in
> > which you seem suprised at the dampening of Lettra. Could you tell
> > me why you were
> > supprised?
> > I am getting ready to print a job on 32# lettra and am debating if I
> > should dampen the
> > paper. I will be printing on polymer plates with primarily line art
> > with black ink.
> > I have dampened heavier weight paper before with good results but I
> > am wondering if it
> > makes sense for a lighter weight paper. I assume it does. Could you
> > or anyone with
> > experience let me know their opinion on this?
> > As always, thanks for the help and advice.
> > bryan kring
> Peter Fraterdeus
> Exquisite Letterpress