Ström (strom_photo@usa.net)
Tue, 20 Apr 1999 22:29:35 -0400 (EDT)
Whatever you do, there is a multitude of definitions, standards, suggestions, and possibilities. Figure it out, and do what works! Don't make a mountain out of mole hill. Photography is discovery. Ask and if you don't get an answer, try to solve it yourself. Then share the answer. Don't expect an answer from other photographers, that will sove your problem (in all cases), because the factors are never consistent. For example, zone photography discusses normal+1 and normal+2 or normal-1 and normal-2. Excuse me! What is normal. Normal is what you find out in your practice. Remember that. You are responsible and need to apply to same techniques that others use in their practice. So, the question really is, "how do set my baselines in my own practice". There ain't much written about it.
Ström
Sil Horwitz <silh@iag.net> wrote:
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At 99/04/20 05:04 PM -0400, you wrote:
>I wonder if British "paraffin" is American "mineral oil"?
British "paraffin" is what we Americans call "kerosene." That is not my
opinion, it's what the authority (Merck's Index) states that. That doesn't mean
that common usage couldn't be anything in the aliphatic series! To be specific,
you need the chemical formula, which I pointed out in my message. Mineral oil
is another one of those ambiguous compounds that can be a mixture of a number
of chemicals. And then there's high viscosity mineral oil and low viscosity
mineral oil. Give the chemical makeup and then it's possible to name exactly
what the compound is.
(The only way I can relate this to alt-photo is that there is the same problem
with compound mixtures such as iron oxalates and citrates - there's no chemical
difference, for example, between the green and brown citrates; it's just how
the molecules are configured, but as we all know, that different configuration
can make a big difference.)
Sil Horwitz, FPSA
Technical Editor, PSA Journal
silh@iag.net
Visit http://www.psa-photo.org/
Personal page: http://www.iag.net/~silh/
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