From: Phillip Murphy (pmurf@bellsouth.net)
Date: 04/06/03-08:50:54 PM Z
Hello Agustin,
Good luck with your polishing technique, I'm sure you'll find the right touch.
One thing to be certain of is that everything remain absolutely as dry as
possible.
The buffing wheels will attract moisture so you need to keep them warm somehow
even when not in use with dry heat or in a box with a drying agent of some kind.
I use calcium chloride for this..
You may wish to explore the use of Plumbago or Graphite for your polishing
agent.
Very fine lamp black also works well as long as it is perfectly dry and has no
oil
associated with it.
Agustin wrote:
> Hello Phillip.
>
> So you are saying that the not so well polished modern dags are the results
> of an aesthetical search, rather than lazyness from the photographers?. =).
> Yes you are right. I was refering to the Polishing wheels. Sorry for my bad
> english. But when It comes to technical vocabulary, I´m lost!. I use one of
> those motors that most people use for polishing metals. So it haves high
> RPMs and it´s 1hp strong. I first start with a thick polsishing weel and
> with rouge on it. Then, after 15 minutes of polishing, I go on to the next
> wheel, a thinner one but still using the rouge (15 min). And at the end, I
> use a soft wheel without any rouge, until I get all the specks and marks
> off(5 min, maybe more). The plate gets hot quite quickly.
> My teacher is Alejandro Martinez. He works as a repro photographer here in
> Buenos Aires, and he started to make dags 4 years ago. I think he learned
> the process with a spanish photographer/conservationist called Angel (Angel
> studied and worked in Rochester.. I think ). He haves two images in Rexler´s
> book "Photography's Antiquarian Avant-Garde: The New Wave in Old Processes".
> Maybe I misspelled the words. I was referring to the faster formula that
> uses bromide for more sensitive plates. I used the iodide formula, less
> toxic and problematic, but the plates need long exposure times.
> Thanks once again for your help!
> Sincerely,
> Agustin Barrutia
>
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