Evaluation of flexibility and drape properties in adhesive treated silk

Abstract

This thesis investigates how flexibility and drape properties in adhesive treated silk are affected when type of adhesive, type of support fabric and concentration and ratio of adhesive are altered. Through a literature review, two adhesives – Lascaux 303 HV in combination with Lascaux 498 HV and Vinamul 3171– and two support fabrics – nylon net and silk crepeline - were selected. Samples were then made, where combinations of the two different adhesives in two different concentrations and two ratios were applied to the two different support fabrics, which were then adhered to silk mock-ups. This resulted in a total of 12 sample combinations. The samples were then tested using the cantilever method to measure bending length and flexural rigidity in both warp and weft directions of all samples. Results show that choice of support fabric had the most significant effect on flexibility properties, with nylon net being more flexible than silk crepeline. Adhesive type, concentration and ratio had less effect on the flexibility and drape properties. Vinamul 3171 underwent Oddy testing, which raised concerns about its chemical stability. Further testing is needed to identify which adhesive and support fabric combination is the most suitable for adhesive treatments, when drape and flexibility are considered. Further testing is also needed to ensure Vinamul 3171 is suitable for conservation use.