Richard Sullivan (richsul@earthlink.net)
Thu, 15 Jul 1999 12:21:57 -0600
Sil,
Rats!
You always were smarter than me. My Merck said "See kerosene" so I thought
it was the same, now that I check it isn't. Sure thing, it isn't benzene.
Great show at APIS. Yours was a very informative presentation.
You didn't really build your first darkroom in 1929???
--Dick
At 01:20 PM 7/15/99 -0400, you wrote:
>At 1999/07/15 09:40 AM -0600, Richard Sullivan wrote:
>
> >Benzine [ine] is another name for kerosene
>
>Sorry, Dick, there might be some benzine in kerosene, but it would be an
>impurity. Benzine is a low molecular weight (meaning it's lighter and more
>volatile) aliphatic hydrocarbon that is the main constituent in the mixture we
>call gasoline (and the British call petrol). Kerosene is a mixture of higher
>molecular weight hydrocarbons, which makes it slightly viscous (oily).
>When the
>oil producers separate the ingredients in crude oil (if you can visualize
>this)
>the highest hydrocarbons are wax (or asphalt in some low-grade crude), then
>lubricant grade, followed by diesel fuel (very similar to kerosene), kerosene,
>and then the low molecular weight constituents that make up the various
>combinations of gasoline. Benzine is purified from the gasoline part.
>
>This all has an interesting history, but hardly altphoto, so I won't go into
>it.
>
>Sil Horwitz, FPSA
>Technical Editor, PSA Journal
>silh@iag.net
>silh@earthlink.net
>Visit http://www.psa-photo.org/
>Personal page: http://www.iag.net/~silh/
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