NA OW? (RE: spectral sensitivity of platinum/palladium and cyanotype coatings.)

Loris, I am not familiar with NaOW. What is it and at what concentration are
you using it?

Eric Neilsen Photography
4101 Commerce Street, Suite 9
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http://ericneilsenphotography.com
 
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> -----Original Message-----
> From: Loris Medici [mailto:mail@loris.medici.name]
> Sent: Tuesday, February 21, 2006 11:31 AM
> To: alt-photo-process-l@sask.usask.ca
> Subject: RE: spectral sensitivity of platinum/palladium and
> cyanotype coatings.
>
>
> Interesting. I can print Ziatype emulsions - incorporating
> considerable
> amnt. of contrast lowering NaOW additive - which exhibit 30
> steps with a
> 31-step tablet (read as: emulsion needs log 3.00 density
> range!) using the
> PDN system and 1290 printer (1280 equivalent in Europe) easily.
> Of course I
> have to use the stongest color G255-B0 with this emulsion, but
> I can
> definitely print with good dmax and specular highlights that
> are paper
> white.
>
> -----Original Message-----
> From: wcharmon@wt.net [mailto:wcharmon@wt.net]
> Sent: 21 Şubat 2006 Salı 18:10
> To: alt-photo-process-l@usask.ca
> Subject: Re: spectral sensitivity of platinum/palladium and
> cyanotype
> coatings.
>
> ...I have no difficulty at all making negatives with enough
> density range to
> print Van Dyke, which is something I found difficult to do
> using the
> straight PDN approach, especially on the 1280...
Received on Tue Feb 21 17:25:46 2006