Re: Light indicator band issues.
Re: Light indicator band issues.
- Subject: Re: Light indicator band issues.
- From: Mark Stegman <email@hidden>
- Date: Tue, 19 Nov 2013 00:04:50 +1100
Graeme,
You are teasing us. Please elaborate. I had the same 'ambitions' as Axel but only mirrored his disappointment.
What exactly is 'sufficient' to achieve a match with a metameric pair?
If these things are so inadequate why does UGRA/FOGRA/GATF market them?
Mark
On 18/11/2013, at 11:32 PM, Graeme Gill <email@hidden> wrote:
> Axel Robert wrote:
>> Dear all,
>>
>> I experience some problems with different light indicators like :
>>
>> PANTONE® LIGHTING INDICATOR Stickers
>>
>> PIA/GATF RHEM Light Indicator
>>
>> Ugra/Fogra light indicator
>
> Those indicators seem incredibly vague in what they are supposed to do,
> and under what conditions they "work".
>
> The Pantone indicator talks about "being viewed under a 5000K (degrees Kelvin)
> standard light source.", and the others use similar terminology,
> but this is nonsense - such indicators depend on the colors being visual
> metamers under a certain light _spectrum_. Merely being the right color
> temperature is not sufficient to guarantee a match.
>
> Graeme Gill.
Mark
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