Re: Spectrolino repair
Re: Spectrolino repair
- Subject: Re: Spectrolino repair
- From: Ray Cheydleur <email@hidden>
- Date: Wed, 10 Feb 2016 14:34:09 +0000
- Thread-topic: Spectrolino repair
Just to be clear, unless there has been an under the hood change recently, the KM FD series provides M1 using a calculated function using two illuminants. This is similar in fashion to how the i1Pro2 or i1iSis 2 provide M1 capability (M1 part 2). This approach works very well for dealing with the OBA effect of papers but not for unknown UV effects that may be in colorants or other materials like textiles.
The X-Rite eXact instrument uses a different model providing a “true” D50 for M1 measurements (M1 part 1) which makes it appropriate for capturing the fluorescence factor beyond OBA’s. As far as I know the only other device that has taken this approach is the Barbieri SpectroPad, which uses an LED cocktail approach to get D50. Most other older instrument designs that have provided “D50” or “D65” have used a blue filter to attenuate a tungsten lamp which does give you a good visible light match, but does not fully compensate by providing the proper amount of UV excitation.
You can see a graph of the eXact M1 illumination vs D50 here:
http://www.xrite.com/documents/literature/en/eXact_vs_D50_v3_en.pdf<">
For more information on the whole measurement condition story you might want to take a look at an article I co-wrote with Kevin O’Connor on this topic awhile back:
http://www.xrite.com/documents/literature/en/L7-510_M_Factor_en.pdf<">
RayC
Ray Cheydleur
Printing and Imaging Product Portfolio Manager, X-Rite Inc.
--
Hi all,
We use such a FD7 device (and FD9) and the FD7 (two of them) both as a single device and mounted on the ColorScout table.
They are very reproducible and accurate.
I asked X-Rite also to add ∆B support. I am positive that we will find this sooner or later ...
We did extensive research on that matters and published all our (tax funded) findings online:
http://www.fogra.org/en/fogra-research/wc-digital-printing/digital-printing-current-projects/optical-brightener/optical-brightener.html<"> <http://www.fogra.org/en/fogra-research/wc-digital-printing/digital-printing-current-projects/optical-brightener/optical-brightener.html<">>
regards
Andy
_______________________________________________
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