Fig. 9From: Bohemian sandstone for restoration of cultural heritage sites: 3D microstructure and mass transport propertiesLeft: The two-point cluster function for the void phase. Right: The chord-length density functions for void phase. The functions are measured along the principal directions. The mean chord lengths in the individual directions are 46.3, 46.9 and 43.9 µm, respectivelyBack to article page