This training manual grew out of the experience of staff members teaching fundamental methods and techniques of photograph conservation to students and interns in the Picture Conservation Division of the National Archives of Canada. During a period of 12 years, more than 40 different individuals worked in our Photograph Conservation Laboratory for periods varying from four months to more than a year. Several returned after their first term for a second and third work period in order to increase their expertise. None of these interns had any experience in the conservation of photographs, but our laboratory rules required that they have certain credentials, i.e., a background that includes formal training in either fine art conservation (with emphasis on paper documents), or in photographic technology, or in chemistry. Training in fine art conservation is provided in Canada by the Master of Art Conservation Program at Queen's University, in Kingston, Ontario, as well as by a number of smaller colleges. There are about half a dozen similar academic programs teaching the conservation of cultural property in the United States of America. Ryerson Polytechnical Institute in Toronto, Ontario, is the only college in Canada that offers courses in photographic technology, but there are several such colleges in the U.S., of which the Rochester Institute of Technology is perhaps the best known. Chemistry can, of course, be studied at almost any college or university. We recommend that individuals who intend to follow the training sequence (program) outlined in this manual receive formal training in at least one of the above-mentioned disciplines. Throughout the manual we refer to the user of this guide as student. We use the term student in its widest sense, i.e., as designating a person who wishes to learn something by doing it and by studying. It does not matter whether that person is employed by a cultural institution, is a student in a conservation course, or is working through this manual on his or her own.