Deterioration and preservation of modern and historical textiles are investigated. Macro and microscopic evidence are combined with theories of fibre degradation and textile soiling to identify the causes of wear, discoloration and failure during the normal use, care and storage of textiles. Theory related to the cleaning of textiles will include detergency, bleaching, dry-cleaning and specialized procedures for historical textiles. Prerequisite: HECOL 270. Normally offered in alternate years.