Fig. 3
From: Shine a light on papyrus: monitoring the aging process
a Papyrus samples aged for two weeks at 90 °C and 50% RH. Left side: untreated Cyperus papyrus L. pith from Qaramos, Egypt, aged without and with light. Right side: Commercial papyrus samples aged without and with light. b Comparison of CIELAB measurements for pith (left) and commercial papyrus sheets, each time before and after aging—with and without the influence of light. Error bars indicate the standard deviation of nine measurements for each time step