Dec 12, 2022
Colour headaches.
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Colour headaches.
Just a quick look at some of the day to day stuff at Clubcard Printing Here is production manager, Nathan Willis using a spectrometer to calibtare the digital press. This unit reads the true CMYK colours and gradiants on the chart and sends that profile to the digital press. (CMYK - C=Cyan M=Magenta Y=Yellow K=Black) This calibration helps ensure consistent colour fidelity since many factors including humidity, heat and the number of impressions can change the colour output on the press. Learn more about how things in the print shop work at www.clubcard.tv 🇨🇦 https://www.clubcard.ca 🇺🇸 https://www.clubcardprinting.com #printshop #colourcalibration #graphicdesign #designer #colourmanagement #graphicdesigner #print #printing #clubcardprinting #clbcrd #clubcardtv #weloveprinttodeath #facebookprinters https://www.instagram.com/p/CC4YQMBBETD/?igshid=1f8zikj0ydof1
Reproduce colour consistently in your photography; have your images colour corrected by our keen eyed professionals. Alternatively specify 'Do Not Colour Correct'
Calibration & Colour Management
Robyn Courtney
Please include what the the settings are measured in?
ØLuminance –120 cd/m2.
Ø Display Colour Temperature – 6500 Kelvin.
Perform the calibration (using the ColorMunki in advanced model, flare & ambient light checks on, ensuring you make the luminance adjustment).
Insert Screen grabs and step by step guide below:
-Profile my display:
-Change tab from easy to advanced.
-Keep profile settings the same e.g. D65(recommended), 120 cd/m2
-Select ambient light smart controls.
-Follow instructions on screen on how to place colourmunki.
-After first test has been done, a tab will appear on the top left corner which you will use to adjust the brightness.
-A second test will then occur after selecting next, this will take roughly five minutes.
-You are now required to adjust the device 12 inches away from the screen and at the viewers eye level where another test will happen.
-Final step is to save the changes made, an immediate difference will be seen.
Compare your screen before and after within the ColorMunki software and note your observations. Make a note of your groups findings (you are to comment on Luminance & Display Colour Temperature).
In comparison, before using the colour munki, our eye made us think that the screen was already calibrated to the right settings. However, after using the munki, it was clear to see that this was wrong as now the brightness and luminance has been decreased greatly meaning that before our prints may have come back under exposed. Also, the display colour temperature was very different as it went from a vibrant, strong and cold tone to now a more warm and subtle tone that is more pleasing on the eye and will allow our prints to be more accurate in colour correction.
Colour Management - Part 2
Which colour workspace is Photoshop set to (on the computer you are using) & what is recommended for photographers?
For the computer I am using my workspace is set at Adobe RGB (1998) and this is also the recommended workspace for photographers to use.
How can Photoshop be in Adobe1998 when a monitor can be in lots of different options?
The default profile for photoshop is Adobe (1998) as in the past when using SRGB in photoshop, the prints were not coming out as well and loosing their detail. Adobe (1998) is much better in terms of printing from photoshop as it preserves much more detail within the image.
How do you know if you have a profile mismatch?
If you have a profile mismatch you will be aware of it straight away as when trying to enter the colour settings, the computer will pick up on any mistakes made and release a warning so the photographer cannot continue and will have to fix their mistake.
What is the accurate Colour Space / Colour Profile that Loxley use, compared to Deadly Digital, and why?
Deadly Digital requires Adobe (1998) as the colour space/ colour profile where as the colour profile that Loxley requires is SRGB normally (industry standard) however, they can now us any RGB type. Loxley uses these colour profiles as the profile has values that the printer converts to something it understands and is able to print and also it makes the prints industry standard. Deadly digital uses Adobe (1998) as it is the best quality for their printers.
What are printer profiles?
Printer profiles are created to suit the printer, paper and ink that you would like to use. Printer profiles are known as (ICC printer profiles) which is the standard set by the International Colour Consortium. This is based on how the colours are printed and what type of paper and printer they would be printed onto. Your image can be transformed from the colour space editing software to colour space (printer and paper), this is also done with the help of the printer profile aware image editing or printing software.
Perform a soft proof using Adobe1998, sRGB and a Generic CMYK in Photoshop, activate the gamut warning and note your observations?
Generic CMYK.
From this screenshot, it is clear to see that when using Generic CMYK, there is a lot of gamut present.
Adobe 1998.
However, when using Adobe 1998, there is clearly a lot less gamut present in comparison to both sRGB and Generic CMYK.
sRGB.
sRGB is much like Generic CMYK, as there is quite a lot of the gamut present. In three of the images it is very strong whereas the bottom left image shows a lot less gamut making it less vibrant in certain coloured area.
interesting fact... both boxes are the same shade of grey. Use your finger to cover the middle line, light plays an important role in colours. #colour #colourmanagement #print #perception #wow #colourdifference (at South Africa)
Colour Calibration
with ColorMunki
The rooms ambient level at the time was 606 lux, this can change continuously due to light source changing, outside ambients affecting inside ambient, length of time lights are on and how new the bulbs are all effect the light.
Display luminance should be at 85-110cd/m2, Gamma space should be at 2.2, white point should be 6500k.
Once the colormunki ran through its sequence as seen in the screenshots, there is a before and after image which changes the colour profile so you can see the visual difference. I took screen shots of this but it will not show the differences because you can only view the image in one colour profile at a time, when the screen switches the profile it changes the image regardless of the screen shot. Short of faking it in photoshop to try and show the difference the best way that can be explained is a documented visual account of the differences.
Before;
Blue coloured screen was a brighter shade of blue.
Reds are more saturated and verging on pinkish.
The Dark area of the foreground is darker
Skin tones are slightly desaturated
Greens have more of a glow to them, more luminous.
Yellows are more saturated and glow.
After;
Blue coloured display screen a slightly desaturated shade of blue.
Reds less saturated, more a truer red than pinkish hue.
Dark area of foreground contains more detail and slightly lighter.
Skin tones more vibrant and alive.
Greens less luminous.
Yellows are a shade more orange but less luminous.
Colour Management.
What is a colour space?
A colour space is a defined range of colours. It varies for each screen, printer and mobile device. Therefore, colour space is a method of organising and understanding the colour capabilities of a device or file.
Why do we need it?
Having a colour space can tell us what colours a printer can print, a camera can capture and a monitor can display. It is a mathematical system of categorising colour, and each colour space references a colour model.
When would you use adobe98 or SRGB?
Adobe created Adobe RGB in order to display colours on a screen the way they would appear when printed. Unfortunately this still only displays about 50% of visible colours. This means that while the Adobe RGB colour space the colours will be more vibrant, the RGB colour space will have more subtle tones.
What is a colour profile?
A colour profile is a way of describing how a system displays colour. Profiles help to control the colours used on certain devices and help to provide the consistency between the devices being used.
When would you use a colour profile?
Colour profiles are most commonly used when finishing an edited image or doing work for a customer. It can be used when choosing the best screen and/or device to view and display your work on.
Screen calibration screenshots done with a colourmunki