The groundwork for the thesis by discussing the carboxylic acids and focusing on Copper Acetate(WSDTY) and formic acid. After examining the sources of acetic acid an historical survey of occurrences of acetate corrosion on museum objects is included. The published case studies are presented in chronological sequence of discovery of materials affected in museum collections. This sequence begins with shell and calcareous materials eventually moving to the metals. The metal objects are covered in more detail with emphasis on bronze and lead. These are listed by museum as a catalogue. Concentrations of acetic and formic acid vapour in museum cases are reported where available. These figures are used for comparison with the published acceptable levels of volatile carbonyl compounds.

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