La chimica e il restauro dei manoscritti: qualche luce, molte ombre

In the last few years the development of experimental techniques and the increase of computational possibilities allowed a significant step ahead in the field of Paper Preservation Science. However, some key results are still neglected by paper scientists. This study shortly reviews some recent achievements (quoted in the bibliography) that deserve further analysis. The proposed examples are related to the rate of paper decay in accelerated ageing experiments, to the FTIR analysis of gelatine sizing, of degraded iron gall inks and of biotic foxing.

On Comparability Relations in the Class of Interval-Valued Fuzzy Relations

In this paper, a new relation for the set of interval-valued fuzzy relations is introduced. This relation is an interval order for the family of intervals and for the family of interval-valued fuzzy relations in a given set, it has the reflexivity property. Consequences of considering such a relation are studied in the context of operations on interval-valued fuzzy relations. A new transitivity property, namely possible T-transitivity is studied (pos-T-transitivity for short). This transitivity property is connected with the new relation proposed in this paper. Preservation of this type of transitivity by some operations is also discussed.