HOW OLD IS INK?
SCIENCE SOLVES QUESTION By detecting r.nd making visible the impurities in writing inks by a chemical treatment, it is possible to learn much about the age of a manuscript by the spread of the ink in the paper. Th}s is done by immersing the paper containing the wiiting in ft solution containing lead and silver stals, and subsequently colouring the insoluble compounds oi these metals by immersion in bichromate solution. The differences of colour produced from a basis of estimating the age of the writing and determining {he character of the ink med Evidence of this kind has been
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https://paperspast.natlib.govt.nz/newspapers/BPB19410122.2.27
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Bay of Plenty Beacon, Volume 3, Issue 261, 22 January 1941, Page 6
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103HOW OLD IS INK? Bay of Plenty Beacon, Volume 3, Issue 261, 22 January 1941, Page 6
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