Porosity clusters of traditional sand cast

Porosity of traditional sand cast. Different porosity clusters are displayed with different colours. The connectivity of the traditional sand cast is lower as compred with the 3D printed sand cast. The displayed 3D image has 300 x 300 x 200 voxels. Each voxel represents a physical volume of 6.53 x 6.53 x 6.53 cubc microns.