[alt-photo] Re: Coating Silver Chloride Paper - Similar to AZO?

[Francesco Fragomeni]

Etienne,

Thanks for your thoughts. You touched on some of my initial concerns. I
couldn't imagine a homemade emulsion laying down and producing a truly
AZO-like result without a lot more involved. I've been asking around to see
if anyone has any images made using this handmade emulsion that is being
taught but so far I've seen nothing.

What is involved with coating Pt/Pl on baryta paper? Is baryta readily
available from some commercial source?

-Francesco


On Sat, Mar 10, 2012 at 12:49 PM, etienne garbaux <
photographeur at nerdshack.com> wrote:

> Francesco wrote:
>
>  what is involved with making and coating one's one silver
>> chloride paper.   *   *   *
>>
>> Also, I've read that making a silver chloride emulsion is
>> actually quite simple (completely relative) and that people have
>> successfully replicated AZO-like emulsions on their own. Can
>> anyone speak to this?
>>
>
> I have extensive experience (for an amateur) making and coating S-G
> emulsions for both in-camera and darkroom-speed materials.  Chloride paper
> emulsion is relatively easy, as you mentioned -- but there are many degrees
> of "relative," and making any S-G emulsion ranks very near the top (just
> under the relatively easiest DIY neurosurgery).  You need to control
> temperature to 0.1 C (and not just static, but the profile of ramping
> temperature over time), time to seconds, and flow rates to very tight
> tolerances to get anything resembling repeatable results.  Also, no matter
> how good your emulsion is, you will never get prints that look like Azo
> unless you make a coating machine capable of laying down a very even layer
> of emulsion, and use it in a dust-free clean room.  You will also need a
> source of baryta paper, or you will need to make your own.
>
> The best start I know for someone interested in beginning to make and coat
> S-G emulsions is the manual James Browning wrote about making Dye Transfer
> Matrix Film.  Of course, it covers many things peculiar to that process as
> well as the basics (emulsion making and coating).  One version is here:  <
> http://www.dyetransfer.org/**images/DyeTran.pdf<http://www.dyetransfer.org/images/DyeTran.pdf>
> >.
>
> If you want an alt process that gives very sharp resolution like
> commercial S-G papers, with the long-scale beauty of Azo or printing-out
> paper, but does not require two rooms dedicated to making the materials,
> try Pt or carbon.  Both can be printed on baryta paper for a very bright,
> high resolution result.  I would suggest monochrome Dye Transfer, which is
> a breathtakingly beautiful process, but for that you would need to make the
> Matrix Film....
>
> Best regards,
>
> etienne
>
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