We also have been using softened (mechanically) Tyvek as the substrate for attaching object numbers. However, for sheer items or lace we use Reemay (spun-bonded polyester). The Reemay tag is prepared with the object number hand printed in indelible ink and sealed with a layer of Paraloid B-72 before stitching to the object. (We use a low w/v% Paraloid so the Reemay does not become stiff.) Mary Gissing Conservator of Cultural Material Powerhouse Museum PO BOX K346 Haymarket NSW 1238 Ausrtralia Tel: 61 2 92170271 Fax: 61 2 9217 0498 [log in to unmask]