Datacolor User to User Support Group.

Just a quick followup: I took a piece of HP APP Glossy home and compared it to the "white" background of the painting mentioned and the paper is definitely whiter when held side by side under the same light.
Which brings up the issue of what "whiter" means. It can mean multiple things. One is higher L* values: brighter. Another is lower b* value (less yellow). A third is optical brighteners, which causes a lower measured b* value, but don't look blue to the eye, instead they make the media looks "white", and make a natural white viewed next to them suddenly seem yellow. The eye is adaptive, without the whitened paper in view, the natural one will look white.


C. David Tobie
Global Product Technology Manager
Digital Imaging & Home Theater
Datacolor
CDTobie@...
www.datacolor.com/Spyder3


-----Original Message-----
From: Jim Miller <jim@...>
To: datacolor_group@yahoogroups.com
Sent: Wed, Aug 19, 2009 3:11 pm
Subject: Re: [datacolor_group] Paper white vs screen white














        

















Just a quick followup: I took a piece of HP APP Glossy home and compared it to the "white" background of the painting mentioned and the paper is definitely whiter when held side by side under the same light. So the paper won't be an issue. I just ordered a Solux D50 four fixture proofing lightbar which will eliminate lighting as a variable in evaluating prints. Should be here later this week.



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jtm