Samples 9 to 22 Disinfestation Building

With regards to the sample taking locations of the individual samples, see Figs. 17f. Judging from the consistency, the material used to build the brick walls of buildings 5a and 5b is a mortar rich in sand but extremely poor in cement (extremely crumbly), covered with a lime mortar plaster. 

Building 5a What is remarkable about the outside of the exterior walls of the disinfestation chamber of BW 5a is that, in places, it ex- 

Very important is the confirmation of the fact that the pigment actually possesses an enormous environmental resistance, since Samples 14 to 15c were exposed to intensive sunshine, wind, rain, etc. for more 

Underneath the first layer of wall plaster, only approximately 1 mm thick, the material appears, by contrast, pale blue, just like the entire east wall of the wing, which is an interior wall of the original disinfestation chamber and whose discoloration is much less intensive (samples 12 and 13). 

The interior walls of the same room, which were incorporated at a later time, i. e., those belonging to the hot air disinfestation chamber (see Fig. 18), exhibit, as expected, no trace of blue. 

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