Kodak's standard black and white paper developer for tray processing, these packets of DEKTOL contain enough chemistry to produce 3 gal of stock solution. This all-around developer is well-suited to a variety of paper types and will produce cold to neutral tones with cold tone papers, or warm tones with warm tone paper, and its design offers high capacity with a uniform development rate for batch printing sessions. Great results with all multi-grade papers. Stable and long lasting - 6 months in full stoppered bottles