Academic thesis
| Erikka Louise Wessel: | A central European gentleman’s jacket of the first half of 17th century. Documentation and conservation. Including a study of difficulty concerning black dyed silk. | Back |
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| Abstract: | The subject of this diploma dissertation is a gentleman’s jacket made of black silk, believed to originate from the north-western part of Germany or the Netherlands, and is dated to the first half of 17th century. A brief description of the object and its history is followed by a documentation of the fibres, the textile techniques, the pattern, the construction and the condition of the object. Analyses of the dyestuff and pH-value is presented. Historic sources and modern literature confirm that components used to dye silk black often are iron(II)-sulphate and tannins. These components cause black silk to degrade quicker than other materials and colours. Sulphate and tannins reduce the pH-value of the object and iron catalyses the oxidation process. Similar degradation problems and possible treatment methods occur in other fields of conservation. A chemical treatment of the black silk was not considered advisable. The object was secured by sewing and crepeline conservation, and supported by building a figurine which can be used in exhibitions and for storage. |
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