Re: defining media white
Re: defining media white
- Subject: Re: defining media white
- From: email@hidden (Anthony Sanna)
- Date: Tue, 2 Oct 2001 11:15:59 -0500
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In the world of papers for desktop printers one may find a "brightness"
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number on the package that describes the paper within. Two questions about
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this notion.
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First - what type of measurement is generally used to describe whiteness of
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the paper media. (For example - is it density, or XYZ, or something else
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entirely?)
Good question. But, sorry, I don't have a good answer. ....just another
question to add.
I while back, the printer that runs our canister sidewalls changed board
mills. They sent up samples of the old and new stock for my approval,
along with the board specs which included the brightness numbers. I
decided to check the numbers with ColorShop and my SwatchBook. I figured
that the LAB L-channel would confirm the mill's luminance numbers. It
didn't. The L-value from the SwatchBook was about 10% higher than the
specs. I don't recall the figures now, but the board's brightness was in
the mid-80's, and my readings were in the low-90's.
So I second Greg's question: "what type of measurement is generally used
to describe whiteness of the paper media".
...and how does it relate to measured values from a spectro?
Tony
Anthony R. Sanna
Vice-President
SACO Foods, Inc.
6120 University Avenue
Middleton, Wisconsin 53562 USA
email@hidden
www.sacofoods.com
1-800-373-7226
(608) 238-9101
(608) 238-8149 - fax