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

From: Eric Neilsen ^lt;e.neilsen@worldnet.att.net>
Date: 02/22/06-01:11:27 PM Z
Message-id: <005601c637e3$c87ee0e0$51a0fea9@NEWDELL>

I had another symbol in my mind for Tungsten. Thanks.

Eric Neilsen Photography
4101 Commerce Street
Suite 9
Dallas, TX 75226
http://e.neilsen.home.att.net
http://ericneilsenphotography.com
 
> -----Original Message-----
> From: Loris Medici [mailto:mail@loris.medici.name]
> Sent: Wednesday, February 22, 2006 2:50 AM
> To: alt-photo-process-l@sask.usask.ca
> Subject: RE: NA OW? (RE: spectral sensitivity of platinum/palladium and
> cyanotype coatings.)
>
> NaOW is Sodium Tungstate. it's purpuse is to lower contrast of the Ziatype
> emulsion and warm the neutral black image color (LiPd alone gives neutral
> -
> almost coldish black). I sometimes use 10 drops AFO + 10 drops LiPd + 3
> drops NaOW - this gives a very warm image color and a pretty low contrast
> emulsion (but very open shadows).
>
> Regards,
> Loris.
>
> -----Original Message-----
> From: Eric Neilsen [mailto:e.neilsen@worldnet.att.net]
> Sent: 22 Şubat 2006 Çarşamba 01:26
> To: alt-photo-process-l@sask.usask.ca
> Subject: 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
> Dallas, TX 75226
> 214-827-8301
> http://ericneilsenphotography.com
>
> Skype : ejprinter
> > -----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.
Received on Wed Feb 22 13:11:23 2006

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