The useful life of color transparencies is extended by duplication onto new color film material. The type of copying film selected and filtration during copying enables color correc-tion, color intensification and contrast adjustment as well. The author presents a variety of copying accessories (units that may be attached to 35mm cameras) and he compares color characteristics of a number of color transparency films. (Ed. note: This may be of use to practicing conservators who may want to extend the life of their color transparencies.)