French knot shoes contamination archival materials photostats Quick Response pants Angel filet lace velvet Royal Museum of Mariemont Silk wool identifying lace dress 19th century Accessories label Busts and mannequins conservation stripes mercury Polyester transport 20th century sash silk vacuum Leaves to Beads Zuzu archives cross-stitch Jute textile fibers lace Identification construction purse surface satin stitch ombré roll stitch machinery mauvine Rayon contagious residue accession Raschel tatting lace Bodily Memory burn test details 1970s symbolism WildWorks cuffs cap stockings unpacking cross reference braiding technique crucifix photographs