[rollei_list] Re: Mamiya makes it official.. Dags
- From: Carlos Manuel Freaza <cmfreaza@xxxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 25 Apr 2006 14:44:48 +0000 (GMT)
In general, the people linked or/and dedicated to
preserve and to restore old photographs taken and
developed using old materials and processes are
interested about them, also a few photographers for
artistic purposes. The problem about to work with
primitive processes like daguerreotypes is that the
photographer needs to prepare and to sensitize metal
plates and then the development is a part of the
complete process only.During some steps of the
daguerreotype process the photographer needs special
cautions like the cautions adopted for chemical
industrial processes workers and sites...
The attractive about the daguerreotype is that it was
the first reliable photographic process and there are
historic dags very much in good condition yet.
In general, according the article I quoted yesterday,
a sensitized copper plate is 12 or 13 points less fast
than a 100 ISO film, the exposure requires from eight
seconds to several minutes according the circumstances
and then the model must be immobile and relaxed during
that time...
All the best
Carlos
--- Peter J Nebergall <iusar4s@xxxxxxxx> escribió:
> Not long ago my girlfriend found me a 1905 textbook
> of old photo
> processes -- which contained complete chemical
> formulae for a # of the
> old ways. I'm drawn to Talbotype...
>
> We'll be like photographic Amishmen...
>
> Peter Nebergall
>
> On Mon, 24 Apr 2006 23:31:29 +0000 (GMT) Carlos
> Manuel Freaza
> <cmfreaza@xxxxxxxxxxxx> writes:
> > --- Marc James Small <msmall@xxxxxxxxxxxxxx>
> > escribió:
> >
> > >> There are stil folks risking their health
> making >
> > Dag images and doing selenium tonings.
> >
> > I have seen an impressive exhibition called in
> Spanish
> > "Capturando la luz" (Capturing the light) about
> 100
> > photographs from the Oakland Museum of California
> > shown during some weeks in a museum in Buenos
> Aires.
> > There are photographs -including excellent dags-
> from
> > 1850 to 2000 about California.
> > Most dags have a good condition regarding their
> > preservation and they have a high historic value
> > showing people, cities and landscapes according
> they
> > were in 1850, '60,'70,'80.
> > The dags are unique pieces since they are not negs
> and
> > as you comment the process is very dangerous
> because
> > it requires elements like mercury. I have an idea
> > about this process from the copper plate
> polishment
> > and I know about a photographer still making dags,
> he
> > uses a Hasselblad with the plates back obtaining
> good
> > dags 63x63mm and he does the complete process from
> a
> > raw copper plate to the final dag.
> > This photographer, Carlos Dario Albornoz, wrote an
> > article about the complete dag process, it was
> written
> > in Spanish, however you can see the dag and photos
> on
> > the means he uses for the process (as you wrote,
> there
> > are people making dags now and someone will do
> > chemical photographs the next century):
> > http://www.fotomundo.com/index.php?y=notas2&id=726
> >
> > All the best
> > Carlos
> >
> > __________________________________________________
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