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The Ambrotype photograph was
made by coating a piece of glass with silver solution and exposing this to
the image. The image is on the BACK of the glass and is sandwiched
with another glass behind it. The back glass is coated with a black
substance.
Care must be taken to not scratch the back, dark surface, as you will
scratch away the photograph. Because the photograph is glass and very
fragile, all Ambrotype pictures were mounted in a frame, usually brass,
and then placed in protective case.
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