Fig. 1
Isochrone plots for the C collection. Left: non-acidic books (pH 6.8, DP0 1550, and threshold DP 300). Right: books with iron gall ink (pH 5, DP0 600, and threshold DP 400)
Fig. 1 | Heritage Science
Isochrone plots for the C collection. Left: non-acidic books (pH 6.8, DP0 1550, and threshold DP 300). Right: books with iron gall ink (pH 5, DP0 600, and threshold DP 400)