Plot 69: 50% Darkest & 50% Lightest
Cite as: Barrett, T., et al. "Plot 69: 50% Darkest & 50% Lightest." Paper through Time: Nondestructive Analysis of 14th- through 19th-Century Papers. University of Iowa. Last modified May 30, 2022. http://paper.lib.uiowa.edu/plot69.php.