Black Point Monitor Calibration

[jejes]

I was seeing this video https://www.youtube.com/watch?v=d93wIX5PjUw while i discovered she sets black point in monitor to calibrate in 0.4 when sets the brightness 100 cd/cm2.
Is it to set around a 1:250 contrast ratio for a printed copy match with the monitor? (100/0,4=250).

I usually set black point to minium set on a monitor (black point native) more than 20 years with CRT, LED monitors. Is better to set a contrast range between 1:250 and 1:300. I ever print my photos because i'm a photo studio.

And another question for curve gamma i used to set gamma 2.2 but for a few years ago i set L*. Wich is better? My working space is EciRGB or AdobeRGB and i print in a drylab and inkjet printers.

Thank You

[digitaldog]

Modern LCD displays are capable of producing very high contrast ratios. Manufacturers of such displays like to provide these high values as they are attractive for those playing video games or viewing video content. Yet these high values are not useful for those processing images and desiring a good soft proof between a display and a print. On a very glossy paper stock, using a very black ‘photo ink‘, this print may provide a 300:1 contrast ratio. Yet your display may have a contrast ratio of 800:1, 1000:1 or higher. If you soft proof in Photoshop and use the Simulate Paper Color and Ink Black checkboxes found in the Customize Proof Setup Photoshop uses the ICC printer profile to adjust the print contrast ratio onto the display. The results are often disappointing because you see this very high contrast ratio display become dim as the proper contrast ratio for print viewing is simulated. It is far better to calibrate the display's contrast ratio rather than adjusting the ratio solely by using paper and ink simulations in Photoshop. When using just Photoshop to do this simulation, only the image, not the rest of the user interface, is adjusted, which is far from ideal. You may need to raise or lower that setting until you get a better match. The same is true for adjusting the white point and luminance! For matching to matt papers, a 200:1 contrast ratio may be a good starting point. It's not possible to provide an exact value! It takes trial and error to produce the best settings because everyone’s print viewing conditions, inks, papers, and displays differ.

In ICC-aware applications, the display gamma and the Working Space are totally independent of each other and do not need to match.
There is nothing magical about using Lstar for the display but it was once 'all the rage' in europe none the less.

[jejes]

Thank you, then i will try to match with 1:250. Becasue i usually print on luster and glossy papers. Do you suggest then to use a 2.2 gamma better than L* ? I use 2.2 gamma workspaces. For example i calibrate 5800 2.2 80cd, should i set 0,32 rounding to 0.3 if i can't put more digits.

Thank you

[digitaldog]

Again,  in color-managed use, the TRC (or gamma) of the calibration doesn't play a role, as this is done with ICC profiles used in soft proofing, etc. If you've been fine with a 2.2 gamma, stick with it. Outside color-managed apps, it will play a visual role. In the end, the right settings for screen-to-print matching are trial and error:

Why are my prints too dark?
Why doesn’t my display match my prints?
A video update to a written piece on subject from 2013
In this 24 minute video, I'll cover:

Are your prints really too dark?
Display calibration and WYSIWYG
Proper print viewing conditions
Trouble shooting to get a match
Avoiding kludges that don't solve the problem

High resolution: http://digitaldog.net/files/Why_are_my_prints_too_dark.mp4
Low resolution: https://youtu.be/iS6sjZmxjY4

[jejes]

Thank You, i've seen your videos a lot, i find very interesting. I'm using ICC profiles and ICC workflows since 20 years ago. My prints are barely the same as the screen, but today i realized about the black point calibrating. It's all.

Thank you again