Q: If I have already owned a colorimeter/spectrophotometer for Printer profile creation, should I use Unify Color(UC) Profile Calibration Services? What are the improvements?
A: Without putting the printout under a professional viewer, which light source is fulfill international standard, to compare with a calibrated Monitor. How do you verify your printer profile is fine tuned correctly?
For using UC Printer Profile Calibration Service, UC will compare the customer printer's Printout Color under GTI Professional Desktop Viewer at 5000k Color Temperature with UC standard Monitor's Color.
The table below shows the difference between the Typical Manual spectrophotometer and the Industry Leading Automatic spectrophotometer:
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User's Typical
manual type spectrophotometer
|
UC's industry leading
automatic spectrophotometer
|
|
Accuracy:
|
Fairly Good
|
Excellent
|
Patches per A4 paper size
|
288 patches(RGB) or 225 patches(RGB)
(different patches from different vendors)
|
924 patches(RGB)
(Default for Measurement)
|
Patches per A3 paper size
|
none
|
2,226 patches(RGB)
(Default for Measurement)
|
A4 paper size: Maximum number of pages and patches
|
1. total 2 pages with 918 patches(RGB)
or
2. total 3 pages with 729 patches(RGB)
(different patches from different vendors)
|
Total 18 pages with 11,700 patches(RGB)
Remark*1
|
A3 paper size: Maximum number of pages and patches
|
none
|
Total 7 pages with 11,466 patches(RGB)
Remark*1
|
Optimize measurement on Optical Brighteners type papers
Remark*2
|
none
|
Yes
|
Optical Brightening Agents (OBA) Compensation
|
none
|
Yes
|
Integrate Viewing Light Source info into the Printer Profile
Remark*3
|
none
|
Yes
|
Remark*1 - Client can also specify different page numbers for different patch numbers measurement.
Remark*2 - Paper manufacturers put Optical brighteners into paper in order to make a paper look "whiter", they are also called Optical Brightening Agents (OBA). Examples of paper with OBA in it are office plain paper, Epson Premium Matte, Luster, Glossy, etc., and most other brands of commercial inkjet paper.
To optimize the measurement on Optical brighteners type papers for Printer Profiles:
We use the Industry leading spectrophotometer can measure with UVcut and UV during the same
measurement of a page. The spectrophotometer has two different light sources:
One utilizes normal visible light to create the UVcut measurement file.
One utilizes UV light only to create the UV measurement file.
We also use the Profile creator software which has a software algorithm can automatically detect optical
brighteners and corrects the effects in the profile.
Remark*3 - If you have got a Professional Viewer for Proofing, its Color Temp. is not 5000k, you can inform us. We will pick up the closest Color Temp. in the list here and integrate this info in your Printer Profile for your Proofing Purpose.
Finally, to delivery the best quality for our clients, we insist on using the Industry leading spectrophotometer and software for Profile Calibration. Your Printer should give you different impression after our calibration.
In practice, more patches provide more accuracy on the Printer Gamut information. It improves the Printout details specially at the extreme Gradation of the Lightness and Darkness Color Tone.
More patches!
More Details!
The left side example shows the different Printout results by using "Fewer patches" and "More patches" Printer Profile.
Obviously, the highlight details(Gradation) of bridal wedding dress by using "Fewer patches" Printer Profile cannot be reproduced, it just seems like over exposure and the data loss at such areas.
But it can be reproduced by using "More patches" Printer Profile.
Now you know more patches for generating printer profile can benefit more printout details!
