Royal Danish Collections Belgium French knot knit collecting costume beliefs fabrics reconstruction Shanghai ICOM vacuum identifying stitches bar code Nutcracker Stories Leaves to Beads fatal garter split stitch Swan Lake archival materials symbolism protection from evil Busts and mannequins ombré roll stitch gown Chinese traditional Costume SPECTRUM feelings textile fibers Lady in White necklace Identification Raymonda tunic heavy metals chemical lace arsenic linen Guidelines self couching cross stitch disaster planning future considerations digital cotton print dress transporting Marking interview leavers reused clothes Royal Museum of Mariemont folk dress jacket Alto Peru poison collecting policy textile techniques Giselle Rayon accessories