Man-made deterioration was also observed by the LOM investigation; a previous non-accurate consolidation process was detected, an excessive amount of paraloid B72 was added into the surface of the limestone support in a high concentration led to the formation of a bright thick non-porous film upon it (Fig. 7), while salt efflorescence was observed upon many pigmented places on the studied stela (Fig. 8). The SEM investigation which was carried out upon the blue and green pigment has detected the same fragility and loss of cohesion in the two pigments (Fig. 9 and 10).