Re: X-Rite EyeOne iSis with M1 option
Re: X-Rite EyeOne iSis with M1 option
- Subject: Re: X-Rite EyeOne iSis with M1 option
- From: Robin Myers <email@hidden>
- Date: Fri, 08 Aug 2014 13:42:51 -0700
Paper fluorescent whitening agents (FWA) are excited by violet visible light as well as UV light. I have used 405 nm violet LED lasers and 410 nm LEDs to test papers for FWAs, so there is enough excitation light in a tungsten bulb emission to cause paper fluorescence. However, the amount of fluorescence is not as great as that specified for the M1 condition, so there is some scaling and calibration that can be done in software to make a tungsten bulb emission somewhat equivalent to the M1 condition.
Here is a link, http://rmimaging.com/M_Conditions.jpg, to a graph of Hammermill Copy Plus paper measured with an i1Pro 2 using measurement conditions M0, M1 and M2. Notice that although there is some fluorescence with the M0 condition (tungsten-halogen light source only), there is more fluorescence with the M1 condition (D50 light source simulation).
Robin Myers
On Aug 8, 2014, at 1:25 PM, Roger Breton <email@hidden> wrote:
> I guess Graeme must have researched the matter to his satisfaction.
>
> There was a recent thread over this business of M1 vs M0 to which Graeme
> responded and I would not want to put oil on that fire.
> My skepticism with regards to software methods has to do with the little I
> know of tungsten halogen lamps : if the lamp emits little or nothing in the
> 360nm range, where OBs are typically excited, well? I mean M1 is "supposed"
> to closely mimic a "D50" source where there is more UV content than the
> traditional tungsten-halogen lamp.
>
> I guess Graeme must have made side by side comparisons on different
> substrates.
>
> / Roger
>
>
> -----Original Message-----
> From: Printservices, SF [mailto:email@hidden]
> Sent: 8 août 2014 15:10
> To: Roger Breton; 'ColorSync'
> Subject: Re: X-Rite EyeOne iSis with M1 option
>
> Hello,
>
> Not according to Mr. Gill:
> There are more ways to do it than that. ArgyllCMS FWA compensation will give
> you M1 without a UV source (the 'A' source is sufficient).
>
> This means you can do M1 & M2 using a Spectrolino or i1Pro Rev A-D.
>
> Graeme Gill.
>
> That really wasn't the main point of the question.
> Is there another automated chart reader in the pipeline to replace the
> Spectroproofer and iSis devices?
>
>
> Thanks,
> Gary Scott
> Technology Support
> Landor
>
>
>
>
> On 8/8/14 11:37 AM, "Roger Breton" <email@hidden> wrote:
>
>> Err, the Spectrolino is an M0 instrument.
>>
>> Roger
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