Re: Documentation & Proofing Systems
Re: Documentation & Proofing Systems
- Subject: Re: Documentation & Proofing Systems
- From: Ray Maxwell <email@hidden>
- Date: Thu, 18 Aug 2005 09:36:42 -0700
Roger,
On the Spectrum you use a program called "Harmony" to adjust the dot
size on the proof. Dot spatial frequency predicts morie not dot size.
Therefore, Spectrum does a very accurate job of predicting morie. A
slight change in dot size does not have a significant effect on morie
prediction. The proofing media dot gain is very close to the typical
CTP plate dot gain on press. The adjustments on Spectrum are usually
less than 5%.
Just for the record, I favor well color managed inkjet proofs and
stochastic screening on press. There is no need to predict morie when
using stochastic.
Ray
Roger Breton wrote:
There is a digital proofer that makes plates and proofs using the the
same laser imaging system and RIP for both plates and proofs. The unit
is called the Creo Spectrum proofer. This system makes a dot for dot
proof. For every dot on the proof the same dot exists on the plate. If
the dot gain of the press is not the same as the dot gain of the
proofing material then the size of the dot will be slightly different to
correct for this.
Ray,
I am sure I remember reading here once, not too long ago, that in order to
tweak the color on a Spectrum output, one *had* to change the size of the
dot produced on a given donor material. Were my eyes lying to me then or did
I miss something alltogether?
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
|
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