Digital BW, The Print

D50 has long been the standard in viewing booths because humans (on
average) perceive equal amounts of RGB light as "neutral" and are
better at comparing color under a white light source they perceive as
"neutral", as well as being better at comparing colors which are both
illuminated under the same white light source. Humans have a tough
time seeing two colors which are exactly the same under differing
white light sources. Humans see them as different colors. So the trick
here for the human brain is when comparing colors, to view them under
the same white light source. By this I am of course referring to
temperature.  The work done by the CIE decades ago measured human's
perception of what was a neutral white light and discovered it was
5000k. So the industry naturally built upon 5000k.

That is all common knowledge of course. But with that said we realized
that D65 or 6500k flat screens are now the
norm and we had a number of viewing booths made for us that are fully
adjustable and come with D65 (6500k) illumination. This allows the
user to set a viewing booth next to their calibrated D65 monitor and
adjust the light level of the booth to the light level of the monitor.
The brain is best suited at that point for comparing print to monitor
because the white points are similar. 

If interested you can find them here:

http://shopping.netsuite.com/s.nl/c.362672/sc.14/category.232/.f

Look for the D65 models.

Jon Cone
InkjetMall


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale
<stevekale@...> wrote:
>
> D50 is the graphics standard for print illumination.  Lighting
booths are
> most often D50.  When you make ICC profiles, your spectrophotometer most
> likely illuminates the test chart with D50 illumination. It¹s logical to
> have all of these consistent.  Having said all that, the human eye
is very
> good at adapting for differences in white point.  As a result, you are
> likely better off using your display¹s native whitepoint when
calibrating it
> as it will likely produce a more consistent greyscale.  Even if you
choose
> to switch to D50 you will get used to it very quickly and soon a
flick to
> D65 will look awful at first.  Where do you display your prints?  If
indoors
> and lit with normal household lighting then the illumination will
more than
> likely be way below D50...
> 
> 
> 
> From: joaskild <joaskild@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Wed, 30 Aug 2006 14:05:44 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: [Digital BW] D50 or D65 calibration prints & screen
calibration?
> 
>  
>  
>  
> 
> 
> I have always calibrated my screen to D65 (with basicocolor display
+ eye
> one pro) and also 
> the prints profil with basicocolor print3c. I am having a problem
that my
> printprofels are 
> always a bit to dark and I called to Basicocolor for adwice. They
told that
> I should use D50 on
> the screen and prints profils and that they would be lighter? Does
anybady
> know what 
> happens if I change all to the D50 Daylight. Will all my files now
look a
> bit more yellow? I don
> ´t totaly understand this. When I stodyed photography we learnd that
D65 was
> normal 
> daylight. 
> 
> So before I start to change my profile workflow to D50, I like to
ask if its
> a good idea and 
> what changes I can expickt.
> 
> My main problem was that to profiles are a bit darker wich I just
fix by a
> curve in Photoshop 
> but when you make printing via Indesign you have a problem.
> 
> Thanks
> 
> Joakim
> 
>  
> 
> 
> [Non-text portions of this message have been removed]
>