Preservation of Motion-Picture Color Films Having Permanent Value

Graham, C. Loren; West, Lloyd E.

doi:10.5594/j13565

Cited by 20 publications

(5 citation statements)

References 14 publications

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“…15 Changes in temperature per se (i.e., simple temperature changes that do not result in drying out of the film) do not cause any physical damage to film. Humidity equilibration, on the other hand, is usually rather slow -a matter of days, weeks, or months.…”

Section: Cycling Of Temperature and Rhmentioning

confidence: 99%

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Basic Strategy for Acetate Film Preservation

Reilly¹

2002

Microform &Amp; Imaging Review

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This article provides an overview of environmental specifications for film storage. It explains the relationship between temperature, relative humidity (RH), and ‘vinegar syndrome,’ the slow chemical decomposition of acetate plastics leading to loss of their value in a film collection. Its main purpose is to help collection managers evaluate the quality of the storage environment they provide for their film.

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Section: Cycling Of Temperature and Rhmentioning

confidence: 99%

“…15 Strong oxi-Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/13/15 6:58 PM dants from nitrate may cause fading of silver images and embrittlement of paper enclosures. Degrading nitrate films may introduce nitrogen oxides and/or nitric acid.…”

Section: Volatiles In the Film Vault Atmospherementioning

confidence: 99%

Basic Strategy for Acetate Film Preservation

Reilly¹

2002

Microform &Amp; Imaging Review

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“…The gravity of this impermanence has been highlighted in audio-visual preservation communities since the 1970s [5,6]. Over the years, commercial photographic and film material manufacturers have endeavored to improve the stability of their color stocks [4,7].…”

Section: Introductionmentioning

confidence: 99%

Digital Unfading of Chromogenic Film Informed by Its Spectral Densities

2023

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A material-based approach for the digital restoration of chromogenic photographic and film materials affected by dye fading is proposed. Through a digital reconstruction of the original optical properties, the proposed restoration methodology approximates the original color appearance in a non-subjective manner, thus improving the results compared to conventional RGB tonal re-adjustment of the film scan both in terms of quality and presumed faithfulness to original appearance. In order to do so, the degree of fading is derived from neutral black parts of the film’s image content, and the knowledge of the film material’s spectral densities is used to digitally reconstruct the colors corresponding to the material’s original dye concentrations and render them in an RGB space. For a comparison, results from conventional re-grading were adjusted to render them most similar—and thus comparable—to the results of the proposed spectrally informed digital unfading. The restored images obtained through spectrally informed unfading were deemed clearly superior in terms of color subtlety, color faithfulness and coherence.

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“…This is a prevalent problem for chromogenic materials produced between the 1940s and 1980s, whose dyes were often photochemically and thermodynamically unstable. The gravity of this deterioration has been highlighted in the film preservation community since the 1970s [1,11,19].…”

Section: Introductionmentioning

confidence: 99%

A Spectral Approach to Digitally Restore a Faded Agfacolor Print from 1945

Trumpy¹,

Chatterjee²

2022

archiving

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The negative-positive chromogenic process, despite being an important milestone in the evolution of color motion picture film technology, exhibits significant fading of its image dyes, leading to the loss of chromatic integrity. A complete spectral approach for the digital restoration of chromogenic film is proposed. A materialbased image processing method allows to extract the residual color information associated with the analytical densities, selectively enhance the faded dyes, and finally recreate the original aesthetics by associating the spectral properties of the film stock.

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Preservation of Motion-Picture Color Films Having Permanent Value

Cited by 20 publications

References 14 publications

Basic Strategy for Acetate Film Preservation

Basic Strategy for Acetate Film Preservation

Digital Unfading of Chromogenic Film Informed by Its Spectral Densities

A Spectral Approach to Digitally Restore a Faded Agfacolor Print from 1945

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