Re: Creo Spectrum
Re: Creo Spectrum
- Subject: Re: Creo Spectrum
- From: Terry Wyse <email@hidden>
- Date: Tue, 21 Sep 2004 13:21:27 -0400
Jim, you might have them check the laser power of the Spectrum. I'm not
intimantly familiar with the Spectrum but my guess is they should be
able to increase the laser power to increase the density. If that's not
it, then a change in imaging material is in order, either different
material from the same vendor or a change to a different vendor. There
used to be a couple of different sources of material for these devices
but I'm not sure if that still exists today.
I'd also measure the chroma of the yellow. Should be 90 or greater.
It's possible that the chroma is fine but the yellow is too "clean" and
doesn't have enough L* compared to the chroma resulting in correct
chroma but not enough density.
Good luck,
Terry
On Sep 20, 2004, at 6:16 PM, Jim Rich wrote:
I am at a client with a Creo Spectrum. And as I measure the solid ink
densities (SID) from the CMYK off of this device I am reading what I
consider to be a very low yellow density of .70. I would expect a
printing
press to have the solid yellow at least at a density of 1.0.
This low yellow density is also being verified in the ICC profile.
I am also told that since the Spectrum is digital the SIDs cannot be
adjusted without changing the sheets of CMYK pigments. Right now the
lower
density sheets are being used.
The real problem is that this device does not profile well at this
moment.
But I have only been there one day.
I have made a few profiles and they are not that good in terms of
saturation
and matching other files (that used profiles for color separation) this
client has printed in the past.
This client considers the Spectrum to be their internal printing
press, so
the files are color separated using the spectrum profile. Then after
every
one in the process looks at and oks the Spectrum prints, the files
get
sent to a press.
Can any one comment on how to get more yellow density out of this
device?
Or can anyone provide a tip about how to get more color saturation
out of
this device when it is profiled?
Today I was using am using Gretag PM v5. Tomorrow I will use both
Greatag
and Monaco.
Thanks
Jim Rich
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