Zyklon-B

[Brechun]

Look what a little search on wikipedia can bring up:

http://en.wikipedia.org/wiki/Zyklon_B

Modern Holocaust deniers assert that Zyklon B gas was not used in the gas chambers, as evidenced by the low levels of Prussian Blue residue in the chambers, as found by Fred A. Leuchter, for instance. In 1994, the Institute for Forensic Research in Krakow, however, reexamined this claim on the grounds that formation of Prussian blue by exposure of bricks to cyanide is not a highly probable reaction (Amoklauf gegen die Wirklichkeit. Praca zbiorowa; B. Gallanda, J. Bailer, F. Freund, T. Geisler, W. Lasek, N. Neugebauer, G. Spenn, W. Wegner; Bundesministerium fuer Unterricht und Kultur Wien, 1991). Using more sophisticated microdiffusion techniques, they tested 22 samples from delousing chambers, alleged gas chambers, and living quarters, finding cyanide residue in both the delousing chambers and the ruins hypothesized as gas chambers, but none in the ruins of the living quarters,[3] thus supporting the identification of the gas chambers as correct. (Leuchter did not test any samples from living quarters or other negative controls.)

http://www.holocaust-history.org/aus...r/report.shtml

[Stick to the Facts]

Originally Posted by Zorn

Look what a little search on wikipedia can bring up:

http://en.wikipedia.org/wiki/Zyklon_B



http://www.holocaust-history.org/aus...r/report.shtml

I'll add to that:

The gas chambers' walls weren't stained blue to the extent that the walls of the delousing chambers were simply because it takes higher concentrations and longer exposure to kill lice than to kill humans.

The HCN gas wasn't left in the human gas chambers for more than a few minutes before it was removed and the process of removing bodies commenced.

Even so, as Zorn has noted, the residue was in the walls.