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Table 2 Percentage water content in parchment at varying RH

From: The effects of hydration on the collagen and gelatine phases within parchment artefacts

  New Historical Medieval
Tm °C 4 4 4
% RH    
55 14 (+/−1.0) 11 (+/−0.8) 16 (+/−1.1)
65 19 (+/−1.3) 18 (+/−1.3) 21 (+/−1.5)
75 21 (+/−1.5) 20 (+/−1.4) 24 (+/−1.7)
86 23 (+/−1.6) 20 (+/−1.4) 25 (+/−1.8)
95 26 (+/−1.8) 24 (+/−1.7) 28 (+/−2.0)
98 26 (+/−1.8) 23 (+/−1.6) 29 (+/−2.1)
  1. Percentage of water absorbed by parchments as a function of the RH at 4°C as determined using equilibrating weights by [29].