CONDITION OF INK WHEN FIRST PLACED ON PAPER--ITSMETAMORPHOSIS AND AFFINITIES--IGNORANCE OF THEFORGER AS TO ITS ORIGINAL ENVIRONMENT--TREATMENTOF OLD INK MARKS--HOW PAPER MAY DISCOLOR INK--THE USES OF ACID IN INK--VEHICLES TO HOLD INK PARTICLES AND PRESERVE THEM--INKSFIVE CENTURIES OLD DO PRESERVE TH...
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Updated 113 Episodes
Forty Centuries of Ink
Episode 54
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