Datacolor User to User Support Group.

Hi,

 

The Datacolor test prints have some b&w pictures.  One of them has a line of
light to dark gray squares.  What I did was to crop the gray square line out
of the picture and then print just the cropped line of squares.  If you
position them at the top of the paper you can make profile adjustments, move
the line down on the paper and get about 7-8 iterations on a single sheet.

 

Print the line using your profile and then measure one or more of the
squares using the spectro. It will tell you the "color" in Lab units which
you can use to adjust the sliders and make a new profile. If you're like me
you may want to find an on line Lab to RGB converter (I can't think in Lab).
Just for kicks, measure the "white" of the paper you are using, you may be
surprised to find some blue.  Also, I would stay just with the Canon paper
until you have things sorted out.

 

One other thing about the printers you are using. The i950 has only one
black ink; I'm not sure if you new printer has both a black and a gray ink.
It can be difficult to get a neutral gray with only one black ink since the
printer has to make gray from mixing the other colors.

 

CD hasn't chimed in on this approach so I will be interested in what he has
to say.  These guys are good.

 

Bob Schoner

 

  _____  

From: datacolor_group@yahoogroups.com
[mailto:datacolor_group@yahoogroups.com] On Behalf Of Bob Petruska
Sent: Thursday, September 03, 2009 12:59 PM
To: datacolor_group@yahoogroups.com
Subject: RE: [datacolor_group] Re: Spyder3Print profiles worse than standard
Canon driver?

 



Bob S.

What grey color would you like me to measure and how do I do that?

Should I go into Photoshop and make a grey square with designated RGB
values?

Then print the square using my Spyder generated profile, then measure using
the Spectro?


Thanks,


Bob P.




At 03:17 PM 9/3/2009, you wrote:



  



-----Original Message-----
From: datacolor_group@yahoogroups.com
<mailto:datacolor_group%40yahoogroups.com> 
[ mailto:datacolor_group@yahoogroups.com
<mailto:datacolor_group@yahoogroups.com> ] On Behalf Of C D Tobie
Sent: Thursday, September 03, 2009 9:04 AM
To: datacolor_group@yahoogroups.com
<mailto:datacolor_group%40yahoogroups.com> 
Subject: Re: [datacolor_group] Re: Spyder3Print profiles worse than standard
Canon driver? [1 Attachment]

On Sep 2, 2009, at 11:19 PM, Bob Petruska wrote:

> Ran the same as 2 above, got the same results; printout is slightly 
> color saturated, towards red tint, soft-proof slightly washed out 
> and fixed it with the soft-proof black level. Canon Standard Driver 
> matches the original image very well. I would like to say that this 
> printer is one huge printer and I really can't see any printout 
> detail differences against the I950.

As for color tint, we really can't talk about that without discussing 
what lighting is involved. 

Hi CD,

Thanks for monitoring this site the way you do, it is very informative.

As for the tint that Bob P is experiencing, could he measure a grey patch
with the Spyder Spectro and report the results? This would remove any
lighting consideration and maybe give a clue as to how to correct. Or, am I
off base here?

Thanks,

Bob Schoner