MQ-52 is a long-life developer designed for the development of warm-tone papers. It produces the same image tone and contrast as Quintol, remains clear during use and has high development capacity. Mix one part stock solution with 1 part water. For average results, develop for 2 minutes at 20C (68F). For a warmer tone, develop 90 seconds. Increased development (up to 4 minutes) will produce cooler tones. Comes in one litre and four litre sizes.