Today I went to an art exhibition which included a couple of photographs and about thirty, mostly oil, paintings. One of the photographs was in a frame about 24 inches square with a photograph about fifteen inches square. The photograph, which was a picture of an indoor mundane domestic mid twentieth century wash day, included a ragged film rebate ( I assumed the lettering HP5 in the ragged black surround was the film rebate but that maybe questionable given that my films have a much less ragged appearance ) Anyhow the rebate took attention away from the picture and, to me, seemed a needless affectation. Can anyone tell me why a picture is presented that way ? To show that nothing has been cropped from the picture as taken ? To look rough and ready ? It tells us it is documentary, although the picture content should do that ? Enlightenment please.