Re: Levels & Curves

[Arthur Entlich <artistic@xxxxxxxxx>]

OK, you got me... ;-) Graphite is organic, since it is carbon, so it
isn't inert in that sense of the word.  It is also, combustible, as you
implied, as in charcoal briquette.  I probably should have stated it is
relatively non-reactive with paper and silver halide images, it is
usually removable with a simple pink eraser, that its oxides tend to be
gaseous in nature, most common form being CO2, which is nondestructive
to chemical photographic materials and left it at that...

Art


Kennedy McEwen wrote:

 > In article <3C29BA44.2080608@ampsc.com>, Arthur Entlich
 > <artistic@ampsc.com> writes
 >
 >> B&W silver halide, if done correctly, can be very permanent.  Pencil
 >> lead is graphite, which is a form of carbon, and inert, which is why it
 >> is used, it doesn't react with any of the chemicals
 >
 >
 > I know what you mean Art, but carbon certainly isn't inert - as your
 > internal combustion engine in the garage, or the nearest match, will
 > testify.  Graphite may be no more combustible than the paper the image
 > resides on, but neither are inert.
 >
 > Following the next deep impact, I don't think our successors will be
 > digging up any pencil drafted notes as evidence of the existence of a
 > bygone age.  :-)




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