Scientific photography in the archive of the Telesforo Bravo-Juan Coello Foundation: the degradation of silver gelatin prints
Abstract
The special nature and value of scientific photography makes this collection an indispensable and valuable documentary source of the Canarian natural heritage. It consists of more than 70,000 photographic objects made of various materials. Most of them are monochrome positive to the gelatin silver photographs and constitute a common photographic process, both in archives and private collections. The first approach to the study us to analyze 4062 copies made with this procedure, so that the main physical signals that affect the image are identified, in order to determine and relate these alterations with the base material of the images. positive copies. The organoleptic study of the copies, through magnifying instruments, and the photographic study by changing the position of the illuminants, will help us to make a first classification and later, the determination of the complementary analyzes necessary for the characterization of the gelatin layer these types of copies.
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References
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