Datacolor User to User Support Group.

Your Spyder profile grays aren't quite as neutral as they would be  
with a pigment printer with multiple grays, but they tend to be within  
two units of neutral (an excellent printer/paper combo can manage to  
get them all within one unit of neutral). The Canon canned profiles  
have a bias towards red (positive a) and a HUGE bias towards blue  
(negative b). Interesting that these results could be seen as  
better... The Spyder is definately doing it's job. Oh, and while you  
see the grays as weak in the Spyder profile, the midgray measures as a  
bit darker than the Canon midgray; though both are very close to a  
middle density.

C. D. Tobie
Global Product Technology Mngr.
Digital Imaging & Home Theater
Datacolor.com
CDTobie@...

On Sep 3, 2009, at 11:06 PM, Bob Petruska <petruska@...>  
wrote:

>
>
> Bob, Dave....
>
> OK, I performed the grey block measurements.  Just so we are all  
> clear, these are the grey blocks for the B/W photo with the church  
> and boat.
>
> I first calibrated the Spectro a few times and measured the white  
> disk in the Spectro base.
>
> L 90.24
> a -1.05
> b -1.16
>
>
> Canon Photo Paper Pro paper white measurement.
>
> L 95.51
> a 0.30
> b -2.85
>
> Now the following are the two large grey and black blocks at the  
> bottom to the left of the word datacolor.
>
> Grey.
>
> L 48.28
> a 2.13
> b 0.52
>
>
> Black.
>
> L 8.22
> a -0.34
> b -4.66
>
>
> I also measured 4 of the grey blocks in the two rows of grey blocks  
> at the bottom.
>
> Top Left
>
> L 91.59
> a 0.11
> b -1.05
>
>
> Top Right
>
> L 56.78
> a 1.63
> b -2.25
>
>
> Bottom Left
>
> L 50.47
> a 1.53
> b -1.05
>
>
> Bottom Right...
>
> L 32.12
> a -5.23
> b -7.75
>
>
>
>
>
> I measured the same blocks using the Canon standard driver...
>
> Grey
>
> L 50.84
> a 3.17
> -b 9.29
>
> Black
>
> L 7.10
> a 1.37
> b -5.26
>
>
> Top Left
>
> L 94.89
> a 0.73
> b -2.48
>
> Top Right
>
> L 54.11
> a 2.87
> b -8.10
>
> Bottom Left
>
> L 52.77
> a 3.16
> b -8.66
>
>
> Bottom Right
>
> L 10.40
> a -1.01
> b -6.20
>
>
>
> The B/W  photo on the monitor looks great, neutral,  grey.
>
> The Spyder ICC profile print doesn't even look close, more of a  
> weaker grey appearance with an extremely faint tint that looks like  
> it is heading towards red.
>
> The  Canon Standard driver  print is a very close match with an  
> extremely faint tint heading towards blue.
>
> I also printed out a photo of a blood red car on green grass, the  
> Spyder profile printed more of an orange red and light green grass  
> compared to the monitor image, were the Canon standard driver  
> printed the red car and green grass the correct monitor colors.
>
>
> Bob, the Canon Pro 9000 has the same 6 inks as the I950 but with two  
> additional red and green inks, sorry no grey.
>
>
> I hope that all this helps determine where I'm going wrong.
>
> CD, yes the 9500 is probably going to give me more of a match, but  
> most of the people I shoot these photos for want gloss.
>
>
> Regards,
>
> Bob P.
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> At 06:21 PM 9/3/2009, you wrote:
>>
>>
>> Yes, you can use the larger medium gray patch in the lower left  
>> image in SpyderProof, printed directly from Spyder3Print, to check  
>> measured neutrality of midtones. Actually, any point in that image  
>> will give you a neutrality measurement.
>>
>> C. D. Tobie
>> Global Product Technology Mngr.
>> Digital Imaging & Home Theater
>> Datacolor.com
>> CDTobie@...
>>
>> On Sep 3, 2009, at 3:59 PM, Bob Petruska <petruska@... >  
>> wrote:
>>
>>> 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@yahoogroups.com] On Behalf Of C D Tobie
>>>> Sent: Thursday, September 03, 2009 9:04 AM
>>>> To: datacolor_group@yahoogroups.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
>
>
> 
>