Matt Baker (Matthew.H.Baker@drexel.edu)
Mon, 02 Aug 1999 16:57:10 -0400 (EDT)
>Date: Mon, 02 Aug 1999 11:32:28 -0700 (PDT)
>From: "C. Richard Head" <c_richard_head@yahoo.com>
>Subject: Re: Pt/Pd-Platine, white spots
>To: alt-photo-process-l@sask.usask.ca
>Reply-to: alt-photo-process-l@sask.usask.ca
>MIME-version: 1.0
>Comments: "alt-photo-process mailing list"
>
>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.
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