A PROCESS FOR THE RESTAURATION OF WRITING OR DECORATIVE MATERIAL ON PAPER AND MEMBRANACEOUS SUPPORTS

Abstract: The process allows to record onto a photographic emulsion or to visualize on a monitor, by means of a camera provided with a suitable sensor-detector, the different optic phenomena activated, on the surface to be investigated, by the I.R and U.V. radiations, so as to obtain quality information of extensive kind and not destructive or invasive manner for reaching, through a comparison with the visible image, the realization of homogeneity and non-homogeneity maps provided with the spectral absorption, reflection and transmission of the different elements present in the surface and in the layers immediately below said surface.

Description: A PROCESS FOR THE RESTAURATION OF WRITING OR DECORATIVE MATERIAL ON PAPER OR ME MBRANACEOUS SUPPORTS The present invention concerns a process for a virtual restauration intervention onto writing and decorative material on a paper or membranaceous support for a draft as close as possible to the original one. It is well known that the inspection of writing and decorative material on paper and membranaceous support, performed through a careful visual check, sustained by a preventive historic and stylistic investigation, allows to obtain a first interpretative outline about the conservative circumstances, the technical realization processes and the materials used for said realization. It is the aim of the present invention to plan out and define restauration interventons on painted and written surfaces as a whole. The aim set forth is reached by means of the process according to the present invention, consisting of the following observations and phases: - photographic I.R. (infra-red) - I.R. luminescence - reflected U.V. (ultra-violet) - U.V. fluorescence photography - multiband reflectography - X-rays - spectrometry, which all allow to record onto a photographic emulsion or to visualize on a monitor, buy means of a camera provided with a suitable sensor-detector, the different optic phenomena activated, on the surface to be investigated, by the I.R. and U.V. radiations, so as to obtain quality information of extensive kind and not destructive or invasive manner for reaching, through a conparison with the visible image, the realization of homogeneity and non-homogeneity maps provided with the spectral absorption, reflection and transmission of the different elements present in the surface and in the layers immediately below said surface. Said maps allow to obtain a package of informations or interpretative data concerning the different layers with the relative dislocation, thus allowing a further stratigraphic analysis. It is evident that a cross check or, even better, the confrontation between the data connected with the pointed out optical phenomena and the different investigation techniques, is of fundamental importance for the confirmation of the assumptios derived form the analysis of the data of each single observation. The advantages of the process according to the present invention are many and evident: - globality: the interrelations between the optic phenomena of the different elements onto relatively large surfaces are pointed out, which, as a whole, can differently be performed in any other way; - low costs and quickness in acquiring a large range of informations on the real work conditions of the handwork, thus sharing in a historic, archival and stylistic study for what concerns the ambient, the school, the author and the conservative cicumstances, without tampering it; - the possibility of investigating parts that are not accessible with the conventional methods by contact. In a possible variant of the process according to the present invention, the presence of scanners is provided and of the reative automatic interpretative techniques so as to obtain quantitative or semiquantitative results, or by means of dedicated software for working out images and automatically obtain the data and the relative informations, by means of the comparison with previously recorded patterns.

Claims: CLAIMS 1. A process for the restauration of writing and decorative material onto paper and membranaceous supports, characterized in the following observations and phases: - photographic I.R. (infra-red) - I.R. luminescence - reflected U.V. (ultra-violet) - U.V. fluorescence photography - multiband reflectography - X-rays - spectrometry, which all allow to record onto a photographic emulsion or to visualize on a monitor, buy means of a camera provided with a suitable sensor-detector, the different optic phenomena activated, on the surface to be investigated, by the I.R. and U.V. radiations, so as to obtain quality information of extensive kind and not destructive or invasive manner for reaching, through a conparison with the visible image, the realization of homogeneity and non-homogeneity maps provided with the spectral absorption, reflection and transmission of the different elements present in the surface and in the layers immediately below said surface. 2. A process according to claim 1 , characterized in the presence of image scanners and of relative automatic interpretative techniques so as to allow to obtain quantitative or semi-quantitative results, or by means of dedicated software for working out images and automatically obtain the data and the relative informations, by means 'Of the comparison with previously recorded patterns.

Inventors: POUCHAIN MAURIZIO, POUCHAIN, MAURIZIO
Applicants: POUCHAIN MAURIZIO, POUCHAIN, MAURIZIO
Application year: 2000
Main classification: B44D7
IPC codes: B44D2, G01J3, G01N21