Dear colleagues: I am considering treatment options for a girl’s dress made of silk organza that has many brown stains – possibly fruit juice or milk. Some of my research suggests that dilute ammonium hydroxide is effective at removing these stains, but I haven’t found any case studies. I would greatly appreciate any information about the practical use of ammonium hydroxide on silk for stain removal. Many thanks, Laura -- Laura Mina Mellon Fellow in Costume & Textiles Conservation Philadelphia Museum of Art 215-684-7578 [log in to unmask]