Keywords: InkErosion.jpg Ink corrosion iron gall ink has oxidized the cellulose causing the paper to disintegrate <br /> The manuscript is exhibited behind glass in a church in Evora Portugal next to the Capela dos Ossos I took the photo through the glass The manuscript is exhibited there without any comment as just a curious old object The light is indirect daylight Manuscript from Igreja de Sao Francisco Evora Portugal 2007-05 Photo by Ceinturion PD-old QualityImage Iron gall ink Ink corrosion Manuscripts in Portugal Sheet music examples |