How Water Destroys Photographs
Water damage to photographs is multifaceted and progressive. On initial contact, moisture penetrates the paper base and swells the gelatin emulsion layer that holds the image. If the print remains wet, the emulsion softens and becomes vulnerable to abrasion, smearing, and adhesion to other surfaces. As the photo dries, the emulsion contracts unevenly, creating warping, cracking, and rippling. Minerals and contaminants dissolved in the water leave behind tide marks and staining as the water evaporates. If the photo remains damp in a warm environment, mold and mildew colonize the gelatin as a food source, leaving dark spots and eventually consuming the emulsion entirely. Photographs that were submerged in floodwater often arrive with all of these issues simultaneously, creating a complex restoration challenge that requires attention to every layer of damage.
