wearer mechanical aids collar fashion Cotton fibers chain stitch portrait storage Pattern cutwork and needlework care policy checklist Swan Lake hospital exhibition embroidery 1970s opera Olympic Games digital mercury prints filet lace handling 1962 reproduction identification of lace stored leavers professional dress insurance weaving textile weaves mask Laos Code of Ethics for Museums collecting costume lace St Gall hair stripes elasticity materials Le Lac des cygnes transportation donor sewing techniques museums Mantas white cotton knit space Zuzu padding forming Qing Dynasty Kongedragter pattern-taking