Greetings and welcome to this guide on the photography collection at Georgetown University. With more than 1,600 photographs by more than ninety artists, the collection is quite extensive. All of the original images are stored in the Library's Booth Family Center for Special Collections and viewable in person upon request. We encourage students and researchers to come in and see these incredible resources intended for use in teaching, learning and research.
The word "photography" is derived from the Greek roots φωτός (phōtos), "light" and γραφή (graphé), "drawing" together meaning "drawing with light".
This guide to the collection is divided by century, with thematic lists of artists for the twentieth century and a list of artists by photographic process for the nineteenth century. Clicking on the link in an artist's name will bring you to the Art Collection Database where you will see all the works by that artist held in the collection.
We would like to gratefully acknowledge the many donors who have helped establish this world-class collection at Georgetown. Beginning with a transformative gift of 239 photographs in 2010 from Georgetown alum and Library Board member Jeff Perry (C'1982), the collection has grown exponentially since then. Mr. Perry has continued his support with substantial annual donations and his combined gifts total close to 800 photographs. We invite you to explore some of them in our student curated online exhibition. We also wish to thank our other generous photography donors: Jude and Patricia Avelino, Mark Callahan, John Chatzky and Debbie Mullin, Ivar Eilertsen, Ronald Francesco, Jennifer and Charles Heckelman, Anne and Robert Hyde, Marc Jaffe, Kathleen Lauster and Jarir Derouach, Bennett Lindauer, Anne and Ray Merritt, Bradley Olson, Fredrick Ott, Ashish Parikh, Sanjiv Patil, Kathleen Quinn, Bruce and Patti Sanford, Ravi Singhvi, and Ertan Yenicay.
The processes described in the tabs below cover the majority of the photographic processes represented in the Art Collection. The University Archives has a large selection of images relating to the history of Georgetown. In addition, both the Archives and the Manuscripts units have examples of early photographic processes. Please see the second page of this guide on Nineteenth Century Photographs.
The daguerreotype process was invented in France by Louis-Jacques-Mandé Daguerre and made available to the public in 1839. The daguerreotype was a polished copperplate onto which an image was directly exposed. The multi-step process began with a thin layer of silver applied to a copper plate, and polished to a mirror finish. In a darkened space, the plate was treated with halogen fumes, or a combination of chlorine and bromine, often finished with iodine fuming. The sensitized plate was transferred to the camera via a light-trapping holder and an image was exposed on its surface through the lens. Exposure time could take a few seconds to several minutes, depending on the concentration of chemicals on the plate, the intensity of the light source and the power of the camera's lens. The plate was then removed in much the same way and developed inside a developing box through exposure to mercury fumes. To stabilize and fix the image it was washed with a salt-based solution. A gold chloride solution was added to create a warmer tone to the image and protect the friable surface layer of silver powder. With no negative created, each daguerreotype is unique. Since the delicate images were susceptible to fading, the plates were encased in a protective glass enclosure mounted inside leather case.
The English scientist William Henry Fox Talbot (1800-1977) developed salted paper prints, essentially a “printing-out” process, in 1834-35, and it became widely available by 1839. The salted paper technique was initially used to create his sunlight exposed drawings known as “photograms," made by placing feathers, lace or other materials onto paper treated with silver chloride and exposing it in ultraviolet light. After processing, the image resulted in a negative where the feather had blocked the effects of the light on the paper. The related technique known as calotype or talbotype created a translucent paper negative that could produce multiple positive images from simple contact printing. Calotype differed from salted paper in the chemicals employed (silver iodide, with acetic and gallic acid) and the physical process, which was developed-out instead of printed-out.
Using paper as a negative resulted in a slightly grainy of fuzzy effect as the paper fiber blurred the image. By 1855, calotype fell out of use as tastes shifted towards the glossier paper and sharper focus images of albumen prints.
The platinum process was patented in 1873 by the British inventor William Wills, and further developed by 1879 when he established the Platinotype Company that made prepared printing papers commercially available.The platinum process is relatively simple but involves complex chemical interactions. The chemistry is based on the light sensitivity of a compound known as ferric (or iron) oxalate. It becomes reduced in ultraviolet light to a ferrous oxalate and reacts with platinum to reduce it to elemental platinum, or palladium. Paper is coated with these chemicals and the exposed image made from contact with a negative is held in the metal fibers embedded in the paper. These prints are therefore less sharp overall and have a matte finish. By varying the amount of platinum and the addition of varying oxidizing agents, these prints can range in tone from a warm sepia to a cool purple-black, and no two prints are exactly the same. Platinum is one of the most durable of metals and platinum prints have the longest lifespan of any photographic media. By the time of World War I, however, platinum came in high demand for war production rendering it more scarce and expensive. The gelatin silver process gradually supplanted the use of platinum in printing papers, and by 1937 the Platinotype Company closed.
The process of albumen prints, or albumen silver prints, was published in 1847 by Louis Désiré Blanquart-Evrard and soon became the most commercially-viable means of capturing a photographic image on paper from a negative. The paper was coated with a solution of albumen (found in egg white), sensitized with silver nitrate, and used primarily with wet-plate collodion negatives and for a short time with dry-plate negatives. Popular throughout the second half of the nineteenth century, albumen prints have a characteristic warm tonality and were commonly used in cartes de visites, portraits of famous people mounted onto cards that were popularly sold, traded, and collected in Victorian photo albums.
Most twentieth-century black and white photographs are gelatin silver prints. They rely on the special properties inherent in baryta paper, which became available to the public around 1900 through the Eastman Kodak Company. Baryta paper has a coating of white pigment mixed with gelatin. The pigment coating allows the developed image to be sharper in focus, with greater detail visible. In the gelatin silver process, a solution of silver salts suspended in gelatin is applied to the baryta paper and exposed in a darkroom to ultraviolet light through a negative. The paper is developed-out through immersion in chemicals, then rinsed and dried.
Digital photography is a completely different form of image making than darkroom photography. Digital cameras including cell phone cameras allow users to create, store and manipulate images composed of data recorded in pixels. Software tools such as Photoshop allow users to alter, combine and transform digital images well beyond the limits of traditional photography. Consumers began using digital cameras in the mid 1990s, and by 2002 they outnumbered the sales of analog cameras. In 2012 the widespread use of digital images led to the bankruptcy of Eastman Kodak.
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