Re: Changing inks
Re: Changing inks
- Subject: Re: Changing inks
- From: Patrick Donigain <email@hidden>
- Date: Wed, 01 Mar 2006 10:57:26 -0600
- Thread-topic: Changing inks
Unfortunately some of the "high end" customers and agencies we are targeting
still demand a dot proof.
As part of this we have had issues with matching final proof trap and solid
colors on press. These final proof colors when plotted against the press
profile are outside the presses gamut.
Also I have always attained better color matchess when the two devices I am
aligning have closer starting points. So I am hoping that by aligning the
pigments in the final proof and the press I will remove one of the hurdles
in getting a good color match. Then it just ink limiting and dot gain
adjustments.
On 3/1/06 9:56 AM, "Jim Rich" <email@hidden> wrote:
> One of the first places I would suggest to start would be to use colorimetry
> to measure the LCH values of the solid inks of all processes to find out how
> they compare. If you have a spectro this will take about 10 minutes to take
> all of the measurements.
>
> Specifically, you want the Chroma of each CMY color of the proofers to be
> slighter higher than the Chromas of each CMY ink on your press. And the L-
> luminance and Hues should be similar on the proofers and the press.
>
> Also, you should look at the lowest L values of the blacks to see how they
> compare. What you might find is that the Fuji Final Proof might have a very
> low L value say of 5. And the press might have a low L value of 10. And the
> Inkjet printer might have a low l value of 12. In that case, the inkjet
> printer cant give you the same visual match in blacks for the press or the
> Fuji proofer. One solution would be to use better paper in the inkjet
> printer, but that might only get the L value to 8 or 9.
>
> Once you find out this information then to help you make better decisions
> about the relationship of the proofers ink sets to your press.
>
> Also, I am just curious as to why it matters if your company uses exact
> halftone dot values on a prepress proof? I can understand why a press person
> might care about having exact dot values on a prepress proof but, it seems
> to me that it is the appearance of the proof is what matters.
>
> However, I find that a number of printing companies are moving away from dot
> proofs because all they care about is the appearance of the proof and they
> are cheaper to create.
>
> Any thoughts on that?
>
> Jim Rich
>
>
---------------------------------------
Patrick Donigain
Imaging Manager
The Marek Group, Inc
W228 N821 Westmound Drive
Waukesha, WI 53186
Phone: 262-549-8900
Direct: 262-549-8932
Fax: 262-549-8910
email@hidden
---------------------------------------
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden