Re: Do I need to upgrade to i1Profiler? With respect to UV
Re: Do I need to upgrade to i1Profiler? With respect to UV
- Subject: Re: Do I need to upgrade to i1Profiler? With respect to UV
- From: Tom Lianza <email@hidden>
- Date: Tue, 12 Apr 2011 21:23:00 -0400
- Thread-topic: Do I need to upgrade to i1Profiler? With respect to UV
Hi Roger,
You wrote: I always was under the,
> wrong perhaps, impression that the single most disadvantage of tungsten
> lighting, relative to D50, was its low UV content.
That is absolutely true
Then you said: you write that
> typical "graphic arts" fluorescent lamps (aka viewing booths) seem to
> exhibit the same low UV energy content as "properly adjusted lamps".
I did not mean to say that. Many booths actually have far less UV than the
relative excitation caused by a tungsten bulb. The point here is that the
booths do not really represent D50 and are very structured and often
deficient in UV. I believe that we need to tighten the booth standards.
Regards,
Tom
On 4/12/11 7:46 PM, "Roger Breton" <email@hidden> wrote:
> Tom,
>
> I don't have data to show (not yet, at least) but I always was under the,
> wrong perhaps, impression that the single most disadvantage of tungsten
> lighting, relative to D50, was its low UV content. Yet, you write that
> typical "graphic arts" fluorescent lamps (aka viewing booths) seem to
> exhibit the same low UV energy content as "properly adjusted lamps".
>
> How is that possible?
>
> Roger
>
> -----Original Message-----
> From: colorsync-users-bounces+graxx=email@hidden
> [mailto:colorsync-users-bounces+graxx=email@hidden] On
> Behalf Of Tom Lianza
> Sent: April-12-11 9:50 AM
> To: Claas Bickeböller; email@hidden
> Subject: Re: Do I need to upgrade to i1Profiler? With respect to UV
>
> Claas
>
> Physically speaking, the tungsten output of a lamp is well understood and
> the amount of uv in a properly adjusted lamp is extremely consistent between
> instruments of any family. Most importantly, the excitation from an M0
> instrument generally excites the OBA in the paper more than most viewing
> booths. If anyone took the time to actually measure the UV excitance of M0
> instruments using a certified tile with OBA, they would have seen that there
> is excellent agreement between instruments.
>
> Regards,
> Tom
>
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