Don Bryant (dsbryant@worldnet.att.net)
Mon, 02 Aug 1999 14:55:59 -0400
Richard,
Do your close friends call you 'Dick'?
Don Bryant
----- Original Message -----
From: C. Richard Head <c_richard_head@yahoo.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Monday, August 02, 1999 2:32 PM
Subject: Re: Pt/Pd-Platine, white spots
> judy asked if rubbing my paper leaves oil in spots:
>
> i was once concerned about this myself so i did a few tests several
> years ago to study this possibility. what i did was to weigh the paper
> both before and after i rubbed it on a very accurate scale maintained
> at an Gaithersburg Office of the US Bureau of Weights and Measures
> (just outside Washington DC). I found that on average my paper has
> gained a median weight of 0.003 nanograms after I wipe it firmly making
> three mean average thorough passes. This experiment was repeated
> sufficiently to establish a 95 percent confidence factor for this
> average, which means to me that its pretty darn reliable. I then
> immediately sealed some of this paper in a spare bell jar i happened to
> have in my trunk and took these samples directly over to the office of
> one of my old RIT college alums. I'm retired of course. Yet, he
> happens to work for the National Institute of Health, headquartered in
> Bethesda just a little ways from Gaithersburg. Of course, I sterilized
> the jar in an autoclave that was available to the public on a first
> come first serve 24-hour loan basis at the National Institute of
> Occupational Safety and Health, which is next door to the National
> Institute of Health. Unfortunately, the loaner bell jar autoclave is
> no longer available because i tripped and dropped it in the parking lot
> when i was taking it back. Both Gathersburg and Bethesda are in
> Maryland. It's broken. He's some kind of biologist. I think he said
> he was a micropathologist, but i didn't seem to write that down in my
> copius technical notes.
>
> anyway, he did a thorough study that took him and several of his
> colleagues more than 14 months of full-time research to finish. I was
> very surprised they were able to do this at taxpayer expense. When he
> explained, I said that they were very ingenius about getting to qualify
> this very important alternative work under the Aids Research Project.
> He said: "not really, they do this sort of thing all the time." During
> the process, they had me prepare several more samples. Once i couldn't
> wash my hands for three days during which times i was required to
> attempt donating regular sperm samples (i think they wanted to freeze
> some for their Master Printer seed bank, but i'll have to go back and
> try that part again with a better movie.) anyway, they found that, and
> this is just for the "routinely washes hands iterations of the
> experiment." For those who are technically-minded or want to verify my
> results, I wash regularly and just before beginning a printing session
> with liquid Dial #1 Antibacterial Soap. in this mystery material, they
> found an weighted average of .027568903 nanograms of solid materials
> comprised on average of the following: 16 percent light skin oil, 13
> percent pulverized dehydrated skin flakes, 27 percent mascerated
> dandruff pulp, and 47 percent "sea salt." The difference was
> attributed to errors and possilbly a bit of h2o (light water).
>
> They concluded that with decent personal hygiene that since the oil
> residue is light skin oil and not heavy skin oil, there is no reason to
> be alarmed. This small smidgen of light skin oil won't interfere with
> any alternative photo, printing, or other art processes and is likely
> to contribute a small increase in the archival permanence of the
> paper/art.
>
>
>
>
> ===
> C. Richard Head, Photographer
> C. Richard Head Fine Art Photography
> Especially Toned Silver Gelatin Photographs &
> Exquisite Platinum and Rare Uranium Limited Editions, imp.
> Workshops and One-on-One Personal Instruction
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This archive was generated by hypermail 2.0b3 on Thu Oct 28 1999 - 21:40:40