Re: Euro Colors?
Re: Euro Colors?
- Subject: Re: Euro Colors?
- From: Marco Ugolini <email@hidden>
- Date: Thu, 11 Dec 2008 15:23:58 -0500 (EST)
Klaus Karcher wrote:
>Ok, I'll renege on my promise:
>
>Klaus Karcher wrote:
>> IMHO a Customer's intention when he asks for "Euro[scale] 100M/100Y"
>> should be read as: "Make it as read as you can in Offset printing".
>>
>> But BE WARNED: applying this rule also to RGB and using RGB 255/0/0
>> regardless of the RGB color space CAN BE HAZARDOUS TO HEALTH (e.g. on a
>> Wide gamut display ;-)
>
>Lab values for 100M/100Y:
>
>FOGRA39: 47.00 68.00 48.00
>
>Lab values for RGB 255/0/0:
>
>MacBook Pro: 59.45 70.78 51.85
>Delta E76 to FOGRA39: 13 (Delta C: +4)
>
>HP DreamColor: 58.85 107.63 65.84
>Delta E76 to MacBook: 40 (Delta C: +39)
>Delta E76 to FOGRA39: 45 (Delta C: +43)
>
>you have been warned ;-)
Of course. Without thorough color management procedures applied to what is displayed on your monitor, all bets are off. That much ought to be clear to most people on this forum by now.
But I wouldn't want anyone to get the mistaken impression that 100M/100Y, properly tagged with Coated FOGRA39 (ISO 12647-2:2004) and color-managed all the way to the display, would exhibit the degree of difference from the FOGRA 39 Lab values that you show for the unmanaged values of R255, G0, B0. That should be made very clear.
As a matter of efficient methodology, I would also suggest that the DeltaE 76 difference formula be abandoned, and DeltaE 2000 be used instead, no matter which instance of color difference is being gauged.
Marco Ugolini
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