The Kodak Professional DEKTOL Paper Developer (To Make 1 Gal) is a standard, black & white paper-developer, for tray-processing, by Kodak. The DEKTOL packet provides you with enough chemistry, to produce one gallon, of working solution. The DEKTOL Paper Developer, is an all-around developer, & is suitable for a variety of different paper-types. The developer is designed to produce cold, to neutral tones, with cold-tone papers, or warm-tones, with warm paper. Its design, offers high capacity, with a set development-rate, for batch-printing sessions.