Re: Printing problem...
Re: Printing problem...
- Subject: Re: Printing problem...
- From: Tom Thompson <email@hidden>
- Date: Mon, 02 Nov 2009 11:08:36 -0800
- Thread-topic: Printing problem...
[What can I do to minimize the press issues?]
Much heavier GCR will stabilize your neutral and near neutral colors across
a normal press run. The CMY numbers you gave appear to be backwards if we
are talking about a neutral color (should be 52 48 45). Even if your black
is at 10% it is too weak (looks to me like U.S. Web Coated (SWOP) v2).
If I take an RGB image at 120 120 120 (neutral and very close to the
callouts you mentioned) and convert to my heavy GCR profile I get 24 21 18
45. Even my "normal" GCR (which is higher than most) is 38 32 29 25.
We have used our heavy GCR setting with much success to maintain color
balance on press regarding neutral images.
Tom
On 11/1/09 8:29 PM, "t labarbera" <email@hidden> wrote:
> I'm asking for advice/suggestions for a friend of mine and I hope you guys can
> help...here's the situation--in his own words:
>
> "For the past several months I worked on a catalog of equipment that is
> largely machined aluminum and steel. We took new photos of much of the
> equipment, using existing images from the previous catalog for the rest. The
> old images entirely grayscale, with colored knobs added as overlays. The new
> images were taken with a Canon EOS 5D. Onscreen they look great; the printer's
> proofs (calibrated inkjet) look great. Much of the printed job is problematic.
> Many of the new images have a magenta or yellow cast. The client and I met
> with the printing company; they claim the color shifts we see are normal,
> within press tolerance. My client is not happy.
>
> Now I know why the older images are gray scale! However, we like the richer
> look of the new images. What can I do to minimize the press issues? One
> thought I had was to use a much more aggressive GCR for the pages with this
> kind of image. I just rasterized one page of the PDF sent to printer. It shows
> they image to have very little K (1-10%), even when the CMY values are
> something like 45 48 52.
>
> Is that a reasonable approach? If so, how should I procede? For this printing,
> I allowed Distillier to convert the RGB images to CMYK."
>
>
> When I asked him about any sort of press profile, he reported the
> following--he's based in the US:
>
> "The printer had no special profile. They asked for US Sheetfed Uncoated v2.
> The proof is OK. Perhaps 20% of the run is OK, but the rest varies. I think
> the issue is that with very neutral images, small variations in ink (esp M)
> become very visible."
>
>
> Advice and/or suggestions I can pass on?
>
> Thanks much!
>
> Terrie
> http://tlbtlb.com/
> email@hidden
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