Begin with an inspection
Preservation starts with the same close look we use for dating. Lay the garment on a clean, flat surface in good daylight and check it section by section: underarms, collar, waist seam, hem, fastenings and lining. Note stains, splits, weak stitching, shattered silk, flaking prints, rust near metal parts and any small holes that might indicate insects. Write these down. A record of condition helps you choose treatment and notice new damage later.
Guidance from the Victoria and Albert Museum, the Canadian Conservation Institute and the American Institute for Conservation agrees on one principle: do the least that solves the problem. Many vintage pieces are better aired and stored properly than washed.
