Restoration can be done in two ways:

Conservative

By following the guidelines of the Superintendency of Artistic Heritage, essentially consisting of a thorough collection and study of historical, technical and environmental data of the work and of the places in which it is kept.

Planning of interventions that are usually detailed as follows

• Careful cleaning and removal of mildew, oxidation and dust.
• Restoring or integrating the deteriorated lead came that is no longer able to contain and support the glass tesserae.

Supplementary

It involves the same actions as the conservative restoration and, if necessary, also replacement of the missing or no longer usable glass tesserae with other tesserae perfectly reproduced and indistinguishable from the originals.

A careful and meticulous attention to observance of the identity of style and technique of the work and its author are the cornerstones on which our restoration is based; for this reason, we use mouth-blown glass produced by historical European companies and vitrifiable enamels and grisaille of various shades (some are typical of precise places and historical periods).

Each operation is documented with photographic material, graph and a detailed restoration report.