Copperplate Data (IMAGE)

Penn State

Copperplate Data

Caption

Time-dependent change in copperplate prints. Close-ups of a small section (1/2 inch wide) of prints from two editions of an Italian Renaissance book by Porcacchi illustrate time-dependent image fading, useful for dating books and prints. The graph shows mean gray-level data for two prints, Cuba and Hispaniola.

Credit

Blair Hedges lab, Penn State

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