The present work uses a popular discrete-scale Monte-Carlo method to determine the extinction coefficient of spherical-void-phase graphitic foams having mean pore diameters d is an element of {400 mu m,600 mu m, 800 mu m}, with porosities epsilon is an element of {0.70, 0.75, 0.80,0.85}. The representative elementary volumes were constructed using a digital generation method, and the surface-area-to-volume ratios were identified directly from the digital models. The extinction coefficients were identified using the aforementioned method and a correlation is fitted to the data. It was found that the extinction coefficient is very large, suggesting that, for mean pore diameters and porosities in the given ranges, graphitic foam may nearly always be treated as a black body. (C) 2015 Elsevier Ltd. All rights reserved.