Fig. 3From: Bohemian sandstone for restoration of cultural heritage sites: 3D microstructure and mass transport propertiesA slice taken from the original grey-scale tomogram. The whole window has the size 1988 × 2032 pixels. The pixel size corresponds to the voxel size, i.e., a = 2.59 μm. While dark regions within the circular disc represent pores, the solid phase is more or less light greyBack to article page