From: Jeff Sumner (jdos2@mindspring.com)
Date: 08/13/02-07:04:30 AM Z
I thought that bi-chromate was mixed with gum and dissolved in oil of
lavender to form the first fixed image?
JD
But despite impressive advances in photographic technology, today's
photographers still use roughly the
same technique as at its conception - when Frenchman Joseph Nicéphore
Niépce captured the view
from his window near Chalon-sur-Saône in 1816.
Light falls on a film impregnated with a silver salt, transforming the
silver ions into neutral silver atoms.
These then aggregate into tiny particles of silver. The developing process
'amplifies' the exposed silver
particles, growing them into grains big enough to appear dark.
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