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Re: [APML] Re: Japanese astronomical magazine
Hi Stuart
Nothing wrong with being safety obsessed, that way the body keeps
functioning the way it was meant to work. No point in finding a process
if it means learning to do AP with one hand and one good eye while
breathing from an oxygen tank.
George
Clear skies and good health
Stuart Heggie wrote:
>
> Got it. Had to ask, I work for a safety obsessed company!
>
> Stuart
> >
> > From: tillerman1@videotron.ca
> > Date: 2005/09/27 Tue AM 07:02:46 EST
> > To: Discussion of Film Astrophotography <astro-photo@seds.org>
> > Subject: Re: [APML] Re: Japanese astronomical magazine
> >
> > Hi Stuart
> >
> > The ammonia hypering of the film (with the recipe I have) does not require a vacuume type or heated hypering chamber. The procedure is to add 2 oz of household strength ammonia to 16 oz of isopropyl alcohol, you then immerse the film (on a reel) in the fluid for three minutes. At the three minute mark you remove the film from the bath and rap the reel on newspaper to rid it of most of the fluid. You then blowdry the film without heat.
> > I spoke with one of our chemists here at work (he was intrigued by the hydrogen hypering that I do) and his cautions were common sense. Don't breath the fumes and watch out for sparks from the hairdryer with the evapourating alcohol.
> > If this does work then I will re-test with denatured isopropyl alcohol and reagent grade ammonia maintaining the correct ratios for the chemicals.
> >
> > George
> >
> > Clear skies and good health
> >
> > ----- Original Message -----
> > From: Stuart Heggie <Stuart.J.Heggie@sympatico.ca>
> > Date: Tuesday, September 27, 2005 6:15 am
> > Subject: Re: [APML] Re: Japanese astronomical magazine
> >
> > > George, your efforts are really appreciated! I am sure you know
> > > that ammonia
> > > is quite dangerous. If you are heating ammonia in the chamber, I
> > > am not sure
> > > that it is safe. Have you checked out the chemistry side of the
> > > equationwith a chemist/ChemEng?
> > >
> > > Stuart
> > > ----- Original Message -----
> > > From: "George Anderson" <tillerman1@videotron.ca>
> > > To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
> > > Sent: Monday, September 26, 2005 11:32 PM
> > > Subject: Re: [APML] Re: Japanese astronomical magazine
> > >
> > >
> > > > Ummm, there is something other than film?
> > > > Seriously, in my continued search for B&W films for AP work I
> > > have been
> > > > reading through the old AAS Bulletins. I found that there were
> > > some red
> > > > and infra-red sensitive dyes used in emulsions which did not
> > > respond to
> > > > hydrogen hypering. But they did respond to ammonia hypering.
> > > > I did a web search on ammonia hypering and found a recipe which
> > > I gave a
> > > > try tonight with some forte-pan 400.
> > > > The results look quite promising since the 1 second exposure shows
> > > > substantially more than any of the hypered tests that I
> > > previously ran.
> > > > The 256 second exposure is also an improvement, but still not to the
> > > > extent of being useful. The fogging of the film was quite low so
> > > I will
> > > > try again sometime in the next week with a longer time in the
> > > ammonia> and see how it improves.
> > > > If the forte-pan works out I may re-visit some of the Ilford
> > > films which
> > > > did not respond to hydrogen hypering.
> > > > Someone has to be moving backwards in technology to make up for
> > > the guys
> > > > moving forward, it is the only way to maintain the balance...
> > > >
> > > > George Anderson
> > > > Montreal Canada
> > > >
> > > > Clear skies and good health
> > > >
> > > > Alan Voetsch wrote:
> > > > > BTW, I'd be interested in having a general idea of how many
> > > folks still
> > > > > do shoot EXCLUSIVELY with emulsion. Any guesses? I'm one.
> > > > >
> > > > > Alan
> > > > >
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