I am researching 1880s bustle gowns. Many of them have rows of tight pleats. Pleats that are still crisp and defined 120 years later. I saw one today a velvet bustle skirt that had long pleats the length of the skirt. I know the trick of using vinegar to hold pleats. That wouldn't work on velvet or hold the pleats for years. Does anyone know how the Victorians created these pleats?