Perhaps no one individual has been more active in this area than Henry Wilhelm. He was a founding member of the ANSI sub-committee that established test methods to measure the stability of color photographs. He served as a technical advisor to film director Martin Scorsese. In fact, he received a Guggenheim grant to continue stability research and also assisted Ansel Adams. He has spent much of his life in these endeavors, and his research was first published in his 1993 landmark book, The Permanence and Care of Color Photographs .
Light increases fading.
The extent of the damage is dependent on the brightness and length of time the photograph spends in the light. Heat and humidity also affect this reaction. To reduce fading to a minimum, the materials must be stored in cool, dry environment. Wilhelm found the best slide film in dark storage stability is Kodachrome. However, this same film has the worst projector fading stability.