PHOTOGRAPHIC PRESERVATION Elaina Granse, Emma Peterson, Marcella Reinke, Faith Schermerhorn SLIDESGOPHOTO.COM 50MM F-0.95 SLIDESGO PHOTOGRAPHY CO Photographic material refers to various types of media that are used for creating or storing photographs. SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO WHAT ARE PHOTOGRAPHIC MATERIALS? 50MM F-0.95 CASED Daguerreotypes, Ambrotypes, Tintypes NEGATIVES Paper, Glass Plate, Cellulose Nitrate Film, Cellulose Acetate Film, Polyester film PRINTS Albumen Prints, Cabinet Cards, Carbon Prints, Gelatin Silver, Salted Paper Prints, Platinum Prints, Cyanotypes, “Crayon Portraits” etc. SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO TYPES OF PHOTOGRAPHS: Identifying Characteristics: SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO 50MM F-0.95 Cased Features - Images are in a small wooden or plastic case - Photos are made of metal, glass covered metal or glass - Popular from 1840-1870 - Each type has their own unique characteristics to tell them apa rt Negative Features - Popular from 1840 - Present - Created by an image forming substance or emulsion being exposed to light. They are inverse images. - Used for both black and white and color images. - Common bases are glass, nitrate film, or safety film. Print Features - Popular from 1850 - Present - Several different types of processes, each have their own distinct characteristics. - Early Example: Albumen Prints, which consists of coating a sheet of paper with egg white, then nitrate which form a light sensitivity on the paper. - Modern Example: Polaroids, involves layers of plastic and film emulsion triggered by exposure to light. ● Cool and dry conditions ● Cold storage ○ Need to transition between cold storage and reading rooms ● Storage sleeves ○ Plastic ○ paper ● Upright and vertical ○ Over 8x10in- store flat in folders ● Store photo prints and negatives separately Storage Celluloid Film Rolls Film Archive Storage General ● No food or drink ● Clean blotter ● Pencils only ○ No pens ● Nitrile gloves ○ No cotton gloves ○ Handwashing if gloves are not possible ● Careful with lanyards HANDLING PRACTICES SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO 50MM F-0.95 Negative in Envelope Support ● Use a microspatula for turning photos ● Support all of large photos when turning ● Use a book stand for photo albums HANDLING PRACTICES SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO 50MM F-0.95 Illustration by Danny Norman Microspatula Physical Damage Chemical Deterioration Caused by Improper Handling and Storage: ● Dirt and accretions ● Tears and losses ● Blocking or sticking ● Creases, Breakage, Crackling and flaking of the image layer ● Skinning or thinning of paper layer ● Distortions such as, Warping or rolling ● Broken or detached elements Involves Molecular Change: ● Staining ● Yellowing ● Fading ● Color Shifts ● Silver Mirroring ● Metal and Glass corrosion Two Main Forms: Decay Characteristics Examples of Physical Damage: Images taken from taminoautographs.com and google. Examples of Chemical Deterioration: Images taken from taminoautographs.com and google. DISCUSSION QUESTIONS: SLIDESGOPHOTO.COM 50MM F-0.95 SLIDESGO PHOTOGRAPHY CO ● In an age of digitization what is the archival value of photographs? ● There are so many types of photographs which leads to multiple types of conservation. Are there cost effective ways to keep multiple types of photographs ? - “Handling And Storage Of X-Ray Films. Recommendations Of The X-Ray And Radium Protection Committee.” The British Medical Journal, vol. 2, no. 3593, 1929, pp. 923–24. JSTOR, http://www.jstor.org/stable/25334311. Accessed 10 Nov. 2023. - Institute, C. C. (2020, April 20). Government of Canada. Care of objects and collections - Canada.ca. https://www.canada.ca/en/conservation-institute/services/care-objects/photographs.html - Library of Congress. (n.d.). Care, handling, and storage of photographs. Care, Handling and Storage of Photographs - Collections Care (Preservation, Library of Congress). https://www.loc.gov/preservation/care/photo.html - Library of Congress. (n.d.). Negatives : deterioration and preservation of negatives, autochromes, and lantern slides : articles and essays : genthe collection : digital collections : library of Congress. Library of Congress. https://www.loc.gov/collections/genthe/articles-and-essays/deterioration-and-preservation-of-negatives-autochromes-and-lantern-slides/ne gatives/ - National Archives and Records Administration. (n.d.). 19th century photographic processes and formats. The Unwritten Record. https://unwritten-record.blogs.archives.gov/2020/05/14/19th-century-photographic-processes-and-formats/ - National Archives and Records Administration. (n.d.). How to preserve family archives (papers and photographs) . National Archives and Records Administration. https://www.archives.gov/preservation/family-archives - Person. (2022, August 26). Damaged photos: Guidelines to types of damage. Tamino. https://www.taminoautographs.com/blogs/autograph-blog/damaged-photos-guidelines-to-types-of-damage - Recognizing cased images. City Gallery. (n.d.). http://www.city-gallery.com/learning/guide/cased-images.php - Roosa, M. (n.d.). Care, handling, and storage of photographs. Information Leaflet on the Care, Handling, and Storage of Photographs - Collections Care - Resources |Preservation | Library of Congress. https://www.loc.gov/preservation/care/photolea.html#Deterioration Citations: CREDITS: This presentation template was created by Slidesgo, including icons by Flaticon, and infographics & images by Freepik THANKS! SLIDESGOPHOTO.COM SLIDESGO PHOTOGRAPHY CO 50MM F-0.95