Re: Colorsync-users Digest, Vol 8, Issue 33
Re: Colorsync-users Digest, Vol 8, Issue 33
- Subject: Re: Colorsync-users Digest, Vol 8, Issue 33
- From: David Remington <email@hidden>
- Date: Sat, 12 Feb 2011 09:24:10 -0500
Savage Super White is OK.
Grays are all off in some way or another.
Robin, thanks for supplying the paper data. I haven't used Superior's papers. The 88 looks pretty good, if a bit dark. Looks like it only comes in 12' rolls.
--David
On Feb 11, 2011, at 3:02 PM, email@hidden wrote:
> Message: 4
> Date: Fri, 11 Feb 2011 11:02:58 -0800
> From: Robin Myers <email@hidden>
> Subject: Re: Neutral Background Seamless Paper
> To: email@hidden
> Message-ID: <email@hidden>
> Content-Type: text/plain; charset=us-ascii
>
> Most papers have a higher reflectance in the far red/near infrared spectrum which can be a problem with digital cameras. Standard film was not sensitive to this region so paper backgrounds worked well for film. The far red reflectance of paper is due to their being colored by dyes, not pigments, and most dyes have this far red reflectance characteristic.
>
> The closest to a flat spectral reflectance in my set of samples is the Superior Seamless #88 Grey. It has an approximate reflectance of 22%, and for a paper, is relatively uniform in reflectance, +-4%, from 380 to 710 nm. Above 710 nm the reflectance increases rapidly, but not as much as other papers.
>
> You can view the spectra by downloading the Superior Seamless collection from http://rmimaging.com/spectral_library/library_index.html and using SpectraShop, which you may download from http://rmimaging.com/spectrashop.html. It does not require a license to view spectral collections.
>
> Robin Myers
>
>
>
> On Feb 11, 2011, at 10:40 AM, David Ramsey wrote:
>
>> List-members (especially photographers),
>>
>> Does anyone know of any commercially available seamless background papers in the white to light gray range that photograph "neutral". That is, when photographed along with a Macbeth Color Checker or a Robin Myers digital gray card, will produce the same neutral (R=B=G) balance without further correction.
>>
>> Thank You in advance
>> David Ramsey
>
David Remington
Manager, Digital Imaging and Photography Services
Digital Imaging and Photography Services
D-70 Widener Library
Cambridge, MA 02138
p 617-495-4701
f 617-495-0403
w http://imaging.harvard.edu
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