High-quality Multigrade Paper Developer from a reputable brand, Ilford Versatile solution suitable for resin-coated and fiber-based enlarging papers Economical liquid concentrate for efficient use, recommended dilution 1 part developer with 9 parts water Rapid development time, complete in just 1 minute at 68 degrees F (20 degrees C) for MULTIGRADE IV RC DELUXE and MULTIGRADE III RC RAPID papers Extended development time up to 6 minutes without contrast change for MULTIGRADE FB papers Long shelf life of approximately 24 months for unopened bottles, and up to 6 months for half-full capped bottles