The orange-brown patina of Salisbury Cathedral (West Porch) surfaces: evidence of its man-made origin.

@article{MartnGil2005TheOP,
  title={The orange-brown patina of Salisbury Cathedral (West Porch) surfaces: evidence of its man-made origin.},
  author={Jes{\'u}s Mart{\'i}n-Gil and Francisco Javier Mart{\'i}n-Gil and Mar{\'i}a del Carmen Ramos-S{\'a}nchez and Pablo Mart{\'i}n-Ramos},
  journal={Environmental science and pollution research international},
  year={2005},
  volume={12 5},
  pages={285-9}
}
GOAL, SCOPE AND BACKGROUND In this paper, we attempt to elucidate the composition and origin of the orange patina on the surfaces of the West-Porch of Salisbury Cathedral by comparison to other known patinas: (i) the orange-brown patina on the marble surfaces of the Acropolis in Athens and the Arch of Titus in Rome whose analyses have shown very high amounts of phosphates, and generally amino acids from animal-skin glue or other protein binders; (ii) the phosphated patinas which also contain… CONTINUE READING