Mix Package into 3500ml of water heated to 50-55 degrees (122-131F). Stir until dissolved, then fill to make 4 litres.
Development time 1.5-3minutes at 20C. Mix 1:3 for neutral tone, 1:2 for more contrast.
Stock solution in full stoppered bottle: 3 months. Stock solution in partially full bottle: 1 month.