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Digital BW, The Print

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Re: [Digital BW] Re: Paper white spectral curves

2010-05-13 by Ernst Dinkla

dlruckus schreef:
> Hi Ernst. What a great effort you've put into this. Thank you.
> Just a quick question if I may. I caught your post relating to the Teflon rolls on the other group and I wondered if you have curves for them using your Spectrolino/spectroscan(?) available as well as those from the i1 that you show in the posted data here. Do you think that the new spectro is less sensitive at the 400nm end of the scale or does it show similar results as your other instruments?
> 
> Your work is going to be very useful to all of us.
> Thanks again, both to you and to your son.
> Regards,
> Duane

It all started with a discussion some time ago on this forum about the 
different white readings of Canson Rag Photographique.
I didn't trust the Spectrocam anymore and it is an old one meanwhile. So 
I got the new Eye ! Basic and did the paper measurements again. 
Meanwhile I have seen lots of discussions on Spectro- Colorimeter 
measurements here, on DPreview forums etc and I think the deviations of 
the Spectrocam were not that bad either. I plan to add its readings of 
Teflon on another page than the paper white page to reduce confusion.

The Spectrocam still has some nice features, the flash light source 
allows faster sampling than the Eye 1, if I pull it over a paper it will 
take up to 30 samplings per patch if I recall it correctly and give an 
average  result. The light source is closer to daylight. It will read a 
slightly wider spectrum. It is no longer available in the market so this 
is not so relevant anymore.

-- 
Met vriendelijke groeten,   Ernst

Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/

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