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Riga 70:
Riga 70:
* http://www.pentrace.net/penbase/Data_Returns/full_article.asp?ID=296 Quarto articolo sulla caseina
* http://www.pentrace.net/penbase/Data_Returns/full_article.asp?ID=296 Quarto articolo sulla caseina
* http://www.getty.edu/conservation/publications_resources/pdf_publications/ethers.pdf Sulla degradazione della celluloide
* http://www.getty.edu/conservation/publications_resources/pdf_publications/ethers.pdf Sulla degradazione della celluloide
+* http://www.bouncing-balls.com/chemistry_tech_conservation/ageing.htm Sulla degradazione della gomma vulcanizzata
[[Category:Tecnica]]
[[Category:Tecnica]]