I am continuing work on the Historical Needlework Resources pages, I have updated the pages the Middle East, including sections on Coptic, Mamluk and Persian historical embroidery. Please feel free to link to these pages if interested.
Historical and Modern Needlework



Ummm, I have to tell you I work for a range of small museums, so have been trained a fair bit by conservators, who would probably have fits (except maybe the dental floss stuff) about some of your suggestions. :( The way we were taught was similar to the splitting - then we sat there with a very sharp scalpel and just very, very, very carefully cut the backs off. It was always find a mechanical method, never, ever a chemical method, as that could do even more harm. And never, ever to apply heat, as it would hasten the breakdown of photos.Now, on the whole I agree with what Chloe is saying but I would also say that most people who do scrapbooking at doing it for enjoyment and as a hobby and don't have the time or resources to treat their photos at the same level as a professional conservator would.
But your alum sounds very special. :)
