Clues In Old Photographs

If you think you  have squeezed every bit of information from your old photos, guess again.

Have you ever considered using an ultraviolet light to date your photos?

Colleen Fitzpatrick, PhD, forensic genealogist showed us how at a recent AFHS event.

Due to photo paper changes over the years, including adding a fluorescent dye to the paper, certain vintages of paper will glow a cool blue colour under ultraviolet (UV or black light)

But not all post-1955 paper was treated with flourescent dye.  Some were left untreated.  If a photo glows under black light it was taken after 1955.   If it does not glow it can be taken anytime.

This was just one of the many forensic genealogy tips Dr. Fitzpatrick shared with us.  There is a weekly quiz on her website that will help anyone become a better forensic genealogist.  She is also the author of several books on the subject of forensic genealogy.

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