VINEGAR SYNDROME TO 16MM FILM OXFORD OXFORDSHIRE UK
At Oxford Duplication we can support you with motion film deterioration, commonly known as Vinegar Syndrome. Whatever the condition of your motion film, we can inspect your film and offer you solutions for digitilisation to high quality digital files.
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Our aim is to support your motion picture film archive requirements with affordable and professional services that will give you the optimum result for all your film needs. Contact our studio on 01865 457000 for a quotation.
MOTION FILM DETERIORATION AND VINEGAR SYNDROME
The decay process follows this pattern:
Acetic acid is released during the initial acetate base deterioration, leading to the characteristic vinegar odor. This signal marks the progression of deterioration.
The plastic film base becomes brittle. This occurs in the advanced stages of deterioration, weakening the film and causing it to shatter with the slightest tension.
Shrinkage also occurs during this process. With the cellulose acetate polymer chains breaking into smaller pieces, and with their side groups splitting off, the plastic film begins to shrink. In advanced stages of deterioration, shrinkage can be as much as 10%.
As the acetate base shrinks, the gelatin emulsion of the film does not shrink, because it is not undergoing deterioration. The emulsion and film base separate, causing buckling, referred to by archivists as 'channelling'.
Crystalline deposits or liquid-filled bubbles appear on the emulsion. These are evidence of plasticizers, additives to the plastic base, becoming incompatible with the film base and oozing out on the surface. This discharge of plasticizers is a sign of advanced degradation.
In some cases, pink or blue colors appear in some sheet films. This is caused by antihalation dyes, which are normally colorless and incorporated into the gelatin layer. When acetic acid is formed during deterioration, the acidic environment causes the dyes to return to their original pink or blue color.
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