Stratigraphic and 3D analysis. Case studies from Dante to Leopardi

The recognition and dating of corrective stratigraphies, in the study of manuscript writings, is fundamental in the preparation of critical editions, for author philology and variant criticism, and in cases of authorship. The analysis of the different "corrective campaigns" of a text can now be carried out with some imaging techniques, from RTI, to interferometers, to photometric stereo, which allow to reconstruct the third dimension: "z", that of time: a technology widely used in cultural heritage, but still not very widespread in the study of texts. The contribution illustrates some cases of 3D reconstruction of manuscripts, from Dante to Leopardi, and proposes a protocol for sharing digital reproduction standards.