Datacolor User to User Support Group.

Hi,

I have the new PFP Suite so I can calabrate all my stuff.

I have two computers (one old and one new)sitting on the same desk. One 
goes on the web and the new one is strictly for photo editing.  Both 
monitors which are LCDs, have been profiled and they look the same, so 
I assume that the Spyder worked.  Gamma 2.2 and 6500K.  Photos on both 
LCDs look good with what I consider good color.

I have also profiled both Ilford Classic Pearl, Classic Smooth Pearl 
and Colorlife paper for my Canon i9100. I used Perceptual when making 
the proiles.  Amazingly all the profiles are very consistant, but all 
are yellowish.  I have to add +5 blue to the profile to make it come 
out close to the monitors.  It's not a big deal, but I figured that 
everything would match closer than it is.


Any ideas or suggestions would be much appreciated.

Thank you for your reply.  My lighting is a compact flourescent made 
by Philips and has a very high CRI=82 and is 5000k. After work I'm 
going to profile the monitors again and also compare some prints with 
a professional profile, which I was never too keen on.  

--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
>
> 
> In a message dated 3/1/06 9:30:55 AM, jonathanwilliams306@... 
writes:
> 
> 
> > I have two computers (one old and one new)sitting on the same 
desk. One
> > goes on the web and the new one is strictly for photo editing.  
Both
> > monitors which are LCDs, have been profiled and they look the 
same, so
> > I assume that the Spyder worked.  Gamma 2.2 and 6500K.  Photos on 
both
> > LCDs look good with what I consider good color.
> > 
> > So far, so good...
> 
> > I have also profiled both Ilford Classic Pearl, Classic Smooth 
Pearl
> > and Colorlife paper for my Canon i9100. I used Perceptual when 
making
> > the proiles.  Amazingly all the profiles are very consistant, but 
all
> > are yellowish.  I have to add +5 blue to the profile to make it 
come
> > out close to the monitors.  It's not a big deal, but I figured 
that
> > everything would match closer than it is.
> > 
> Canon i9100 printers use dye ink, and are prone to color shifting 
under 
> differing light sources (illuminant metamerism, for short). You 
don't mention what 
> kind of light source you are viewing your prints under, but 
whatever it is, 
> with this printer, your choice of final color balance and 
neutrality tweeks will 
> be slightly different under other types of lighting. The fix, and 
you note, 
> is quite straightforward, which is good, as the issue can't be 
eliminated 
> without removing all illuminant metamerism from all colorant/media 
combinations.

> 
> C. David Tobie
> Product Technology Manager
> ColorVision Business Unit
> Datacolor Inc.
> CDTobie@...
> www.colorvision.com
>

--- In colorvision_group@yahoogroups.com, MGochnauer <goch@...> wrote:
>
> >> I have also profiled both Ilford Classic Pearl, Classic Smooth 
Pearl
> >> and Colorlife paper for my Canon i9100. I used Perceptual when 
making
> >> the proiles.  Amazingly all the profiles are very consistant, 
but all
> >> are yellowish.  I have to add +5 blue to the profile to make it 
come
> >> out close to the monitors.  It's not a big deal, but I figured 
that
> >> everything would match closer than it is.
> >
> > Canon i9100 printers use dye ink, and are prone to color 
shifting  
> > under differing light sources (illuminant metamerism, for 
short).  
> > You don't mention what kind of light source you are viewing your  
> > prints under, but whatever it is, with this printer, your choice 
of  
> > final color balance and neutrality tweeks will be slightly  
> > different under other types of lighting. The fix, and you note, 
is  
> > quite straightforward, which is good, as the issue can't be  
> > eliminated without removing all illuminant metamerism from all  
> > colorant/media combinations.
> 
> ...and are you sure you made the correction needed for paper with  
> optical brighteners?  I didn't the first time I tried PFP, and the  
> profiled prints were yellowish.
> 
> Myron
>

Ok. So I re-profiled the monitors and they look the same.
Re profiled the Colorlife on the i9100.  Patches are printed and 
profiled at least 12 hours later.  And when I print test pictures I 
know there is significant color shift in the first 30 minutes, so I 
wait.  I printed the target with Qimage and PhotoShop as well as PFP, 
with no icc awarence.  Anyway, all profiles are consistant and 
yellowish so a +8 to +10 blue balances it.  Maybe it is the 
brighteners.  Sort of glad to hear you also were yellowish.  The 
pictures, I mean.  How does one know what paper has brighteners?

> Maybe it is the brighteners.  Sort of glad to hear you also were  
> yellowish.  The
> pictures, I mean.  How does one know what paper has brighteners?

PFP "Build Profile Setup" screen: click on "Ref White" on the right  
hand side.

Small screen has a check box for "Paper White Compensation".

If you have a negative number in "b", you probably (certainly?) have  
optical brighteners.

Click the compensation button and the negative number is reset to  
zero.  That made all the difference for my profiles.

Of course, you can test for optical brighteners with a "black light",  
too, but the negative number suggests something odd is going on.

Myron

Oh great.  Now I have to take some paper to the local Night Club to 
see how they look.  Oh, wait. Combining two hobbies. ;)

Thanks for both replies.  I will check out the 'white point' this 
evening.


--- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
>
> 
> In a message dated 3/1/06 8:53:29 PM, jonathanwilliams306@... 
writes:

> 
> 
> > How does one know what paper has brighteners? 
> > 
> 
> They glow under blacklight...
> 
> C. David Tobie
> Product Technology Manager
> ColorVision Business Unit
> Datacolor Inc.
> CDTobie@...
> www.colorvision.com
>

you can buy a really cheap blacklight at Spencers Gifts, in most malls.

Optical Brightener flouresces, so it's the easiest way to find out.

-kris 

> -----Original Message-----
> From: colorvision_group@yahoogroups.com 
> [mailto:colorvision_group@yahoogroups.com] On Behalf Of 
> northportphoneguy
> Sent: Thursday, March 02, 2006 11:13 AM
> To: colorvision_group@yahoogroups.com
> Subject: [colorvision_group] Re: Bit of a mismatch
> 
> Oh great.  Now I have to take some paper to the local Night 
> Club to see how they look.  Oh, wait. Combining two hobbies. ;)
> 
> Thanks for both replies.  I will check out the 'white point' 
> this evening.
> 
> 
> --- In colorvision_group@yahoogroups.com, CDTobie@... wrote:
> >
> > 
> > In a message dated 3/1/06 8:53:29 PM, jonathanwilliams306@... 
> writes:
> > 
> > 
> > > How does one know what paper has brighteners? 
> > >

On Mar 2, 2006, at 11:25 AM, Kris wrote:

> you can buy a really cheap blacklight at Spencers Gifts, in most  
> malls.
>
> Optical Brightener flouresces, so it's the easiest way to find out.


Also, Loon Outdoors (loonoutdoors.com) sell one for $9.95.  It used  
for activating their UV cure adhesive but works for testing papers.   
Many online stores who sell fly fishing gear carry it. (I am a  
fisherman and have no conection to Loon.)