RE: UV CUT or NOT subject
RE: UV CUT or NOT subject
- Subject: RE: UV CUT or NOT subject
- From: Matt Louis <email@hidden>
- Date: Fri, 27 Jan 2012 15:39:11 -0600
- Acceptlanguage: en-US
- Thread-topic: UV CUT or NOT subject
Hi Steve,
The ab* values are very close in my opinion. If you can remeasure with UVexcluded and the ab* values remain close (< ab* 0.5) then the papers have similar brightener loads and should look similar to the eye under a variety of lighting conditions to both your eye and your instruments. I would think you could go about your job either way under the circumstances. That being said I do not know of anyone using UVexcluded data for offset press to hard copy proof tasks because many of us enjoy comparing our results to standard print specifications such as Fogra47. The exception to this trend is in softproofing where a UVexcluded version of the press profile makes sense because it prevents the substrate from looking too blue on screen.
Matt Louis
________________________________________
From: colorsync-users-bounces+matt=email@hidden [colorsync-users-bounces+matt=email@hidden] On Behalf Of Steve Miller [email@hidden]
Sent: Friday, January 27, 2012 1:46 PM
To: ColorSync
Subject: UV CUT or NOT subject
What would be the best direction to go with the following press paper and
proofing paper? Use uv cut filter or not.
Proofing paper L*a*b* values measured without UV cut. No UV filter.
L= 96.38
a= 1.83
b= -8.02
Press paper L*a*b* values measured without UV cut. No UV filter.
L= 93.80
a= 1.76
b= -8.20
Both the proofing paper and the press paper appear to have optical
brighteners as seen under a black light.
I'm planning on doing a G7 calibration. Creating a profile of the press
after G7 calibration and creating a proof to match the press using the press
profile. With both papers having optical brighteners, what would be the
purpose of using a UV cut filter?
--
Steve Miller
Color Management Specialist
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