Table 1 XRF analysis of the Gyula and antiquarian photographs performed at three different sites: the cardboard frame (XA; A), pale foxing sites (XB; B) and dark foxing sites (XC; C).
From: Microbial communities affecting albumen photography heritage: a methodological survey
Elements | Gyula photograph | Antiquarian photograph | ||||
|---|---|---|---|---|---|---|
Cardboard frame (XA) % | Foxing PS (XB) % | Foxing DS (XC) % | Cardboard frame (A) % | Foxing PS (B) % | Foxing DS (C) % | |
Ag | n.d. | n.d. | 0.1 ± 0.0 | 0.5 ± 0.1 | n.d. | 1.1 ± 0.2 |
Al | n.d. | n.d. | n.d. | 0.9 ± 0.1 | n.d. | 0.2 ± 0.0 |
Ba | 9.76 ± 0.1 | 8.81 ± 0.1 | 11.83 ± 0.1 | n.d. | n.d. | n.d. |
Br | n.d. | n.d. | n.d. | n.d. | 0.3 ± 0.0 | 0.4 ± 0.1 |
Ca | 0.2 ± 0.0 | 0.3 ± 0.1 | 0.4 ± 0.0 | 0.4 ± 0.1 | 0.3 ± 0.1 | 0.6 ± 0.0 |
Cu | n.d. | n.d. | n.d. | 0.5 ± 0.0 | n.d. | n.d. |
Fe | 0.1 ± 0.0 | 0.1 ± 0.0 | 0.2 ± 0.0 | 0.3 ± 0.0 | 0.2 ± 0.0 | 0.4 ± 0.0 |
Mg | n.d. | n.d. | n.d. | 0.9 ± 0.1 | n.d. | n.d. |
S | n.d. | n.d. | n.d. | 2.5 ± 0.2 | 2.8 ± 0.1 | 3.2 ± 0.1 |
Si | n.d. | n.d. | n.d. | 2.5 ± 0.1 | 0.8 ± 0.0 | 0.6 ± 0.0 |
Sr | 0.6 ± 0.0 | 0.5 ± 0.0 | 0.6 ± 0.0 | n.d. | n.d. | n.d. |
Ti | 11.4 ± 0.1 | 5.9 ± 0.0 | 6.4 ± 0.04 | n.d. | n.d. | n.d. |
Zn | n.d. | n.d. | n.d. | n.d. | 0.3 ± 0.0 | n.d. |
