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

[Francesco Fragomeni]

Just did a Google search for sources for baryta paper. Could something like
the widely available Hahnemuhle baryta papers be used? Would coating be
approached differently with baryta?

-Francesco

On Sat, Mar 10, 2012 at 1:46 PM, Francesco Fragomeni
<fdfragomeni at gmail.com>wrote:

> 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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>