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Old 03-04-2007, 06:08 AM   #1
PeterArnel
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Default Pantone Colours

I moved this thread here rather than continue about phones and plates.
Pantone colours are just numbers that relate to a colour - they have now started putting the L a b reference of that colour in photoshop . http://en.wikipedia.org/wiki/Lab_color_space

L a b
C55.43-39.97-50.71M47.3975.77-3.8Y90-4.3794.6K16.910.26-0.43
The above are the CMYK lab readings we now have to acheive when printing rather than just how thick the ink is (densities) .
Multinationals now specify Lab colours for their corporate colours and can be matched in plastic and fabric etc
Hope it is of interest
Peter
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Old 03-05-2007, 01:58 PM   #2
Robin Springall
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Wot, Peter: you not printing in LAB yet? Come on, man, catch up!

   
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Old 03-06-2007, 11:27 AM   #3
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Robin I was trying to educate our colonies :-) who I understand cant even spell colour right let only see it:-)
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Old 03-06-2007, 01:06 PM   #4
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peter: who I understand cant even spell colour right let only see it:-)
ROFL!!! Thanks for the wiki link...most interesting...from what I've read in places like the ColorSync Users list, the addition of LAB by Pantone is a good thing...

I assume you think so as well???

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Old 03-06-2007, 01:25 PM   #5
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Terrie
Evryone on this list needs to understand lab and profiles. ISO at the moment is trying to put together a standard for spot colours . The problem is that Pantone (bless them) struggle to print to the lab numbers - and more importantly the colour drys back after we print it
Its good fun
Peter
So can u point to where Cyan is on the Lab a and b chart on Wiki
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Old 03-06-2007, 01:28 PM   #6
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peter: Evryone on this list needs to understand lab and profiles.
Well...my understanding of LAB is not for print but for imaging work in Photoshop...I don't go into LAB that often when working on an image but it's quite handy dandy for tweaking the color on certain sorts of images...

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Old 03-06-2007, 01:42 PM   #7
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Terrie
About 10 ish + years ago the leading repro companinies wanted a stanrd colour refrence that they could use to convert their images from rgb to CMYK - (they had been writting special individual programmes) - They formed ICC the international Colour Consortium. They decided to use CIELab colour reference values. So when you convert rgb to CMYK it goes rgb to Lab to CMYK - it meant the only ever had to link the rgb to lab and the output could link lab to CMYK
- WE all use it
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Old 03-07-2007, 02:13 PM   #8
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peter: They formed ICC the international Colour Consortium.
I didn't realize that the ICC wasn't that old...very interesting...

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Old 03-07-2007, 03:11 PM   #9
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http://www.color.org/abouticc.html
Terrie I am sure u know what a profile does and why you should always use one when converting rgb to CMYK - untagged CMYK images coming into aprinter is a nightmare
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Old 03-08-2007, 01:00 PM   #10
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peter: Terrie I am sure u know what a profile does and why you should always use one when converting rgb to CMYK - untagged CMYK images coming into aprinter is a nightmare
Yes...I do and I know of untagged CMYK problems just from reading the ColorSync Users list as I don't have any first hand experience working with CMYK since I print my own stuff on my own Epson 4000...

Thanks for the link...most interesting

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