Among the great variety of our Cultural Heritage, photographic and cinematographic materials are fundamental and direct witnesses of the past. As often happens when dealing with materials of cultural interest, even photographic and cinematographic films can undergo severe deterioration, aging, and color fading throughout the time, leading to the need for proper restoration, conservation, and preservation of these materials. In this context, even though the digitization process is becoming more and more essential, analyzing and studying the analog materials remains fundamental to perform a retrieval or a correction faithful to the original material. For this reason, the lack of technical information (especially for the oldest materials) and the absence of open-source archives of the producing companies underlines the actual and concrete need for a database of physical, chemical, and sensitometric data of both cinematography and photographic films.
The aim of this work is the creation and the promotion of FiRe
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, a big and unique database of cinematographic and photographic materials to support the work of conservators, restorers, and researchers, as the availability of information and the cooperation between institutions and professionals are essential for preserving our Cultural Heritage.
To determine the best investigations for restoration and storage procedures, a visual inspection can provide a preliminary screen for the colour processes used to print the photographs. The high costs of the instruments required to follow the protocols present in the literature make these methodologies challenging to reproduce, especially for institutions with limited resources. Hence, a cheap and advanced investigation protocol is needed. This work proposes a protocol that, besides having this characteristic, observes the degradation of the material as a factor in identifying printing processes. The procedure proposed is composed of four steps: I. print observation: a preliminary examination of the object; II. surface observation: an examination of the surface; III. magnified observation: examination with microscope; and IV. decay and damage: alteration and degradation analysis. A set of photographs from the 1960s to the 2000s were analysed following the proposed protocol. From these prints, it was possible to observe the typical forms of degradation deriving from inappropriate conservation and determine the different materials and formats, proving the protocol’s effectiveness and easy applicability.In addition, the scientific community may access this protocol through the open-access website Colour photographic processes-Preliminary identification by visual exam.
Even today, film restoration (both photographic and cinematographic) is a challenge, because it involves multidisciplinary competences: from analogue film inspection and conservation to digitisation and image enhancement. In this context, thanks to the high manageability of digital files, the film restoration workflow often follows a digitisation step, which presents many approximations and issues that are often ignored. In this work, we propose an alternative approach to the issues commonly encountered in film restoration (mainly concerning colour and contrast restoration) aiming at restoring the original colour appearance, through models of human colour perception.
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