The top image was found yesterday in Biscuit Tin 38,401-38,800 and was shot in 1939 by Hardman (Negative Number 38,763) The bottom image shows the area in the conservation room where I conduct my research. Cellulose Nitrate negative material decomposes via an acidic hydrolysis pathway over time and releases a range of oxides of Nitrogen, including Nitrous Oxide, hence the ventilated area .... and perhaps also the reason why I tend to leave the Archive feeling quite giddy at times !
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