Fred Ziffel wrote: ↑Tue Jan 13, 2026 7:47 am
1. This area was outside when the Germans occupied this camp as can be seen by photo. Ventilation was the best it could be. Looking at the intensity of the stains, I would wager most times they opened the doors and aired out with cross breeze, the wind was out of the north. If my argument is correct, then you can understand how sensitive this building was when exposed to HCN gas. A lot of HCN gas floated a little bit around this area until it blew away?
2. The stain on outside compared to inside are in two different areas on the wall of Cell 14.
Your theory seems to be that Zyklon was accidentally released inside cell 14
and Zyklon separately stained the outside of cell 14. Both unlikely events, and both times on the west wall, which is an unlikely coincidence. However you are right that the stains appear in different locations, which favors that it actually is a coincidence of two separate events. Here is a still from the video above showing where blue stains go almost to the ceiling in cell 14. This staining is behind the sign in your photos.
However I'm still highly skeptical of the idea that blue stains could form on an exterior wall from
airing out. Can a stain be produced while the HCN is rapidly diffusing away? I'm not aware of that happening anywhere else, but maybe it's chemically possible, I don't know.
The other problem is that HCN is not heavier than air, so I wouldn't expect it to only stain the bottom of the wall. But since the stains inside chamber A/III also concentrate low to the ground on all walls, it could be the same here, even if that phenomenon is inexplicable to me.
An alternate theory could be that this was another accidental release. Maybe a single open can on the ground could create that stain, even outdoors.
Here also is a photo comparison between the inside and outside of gas chamber A/III.
The stains here don't match. Maybe there's something on the inside, but the intensity is 10x on the outside. That tells me either there was a Zyklon spill outside, or there was implausibly good exposure conditions during airing out, or else it is normal for wall-piercing stains not to visually match. That last possibility is something we can prove or disprove with other locations.
I realize all this is really tertiary to the Holocaust, but it can inform future debate about blue staining. I'm particularly curious to know why the supposed Zyklon holes at Birkenau Crema II are not stained blue, not even around the exposed rebar.