Combine ingredients for brine in a deep sided 9x13 dish and mix thoroughly. Add salmon filet skin side up to the dish, cover, and let brine in the fridge for 8-15 hours.
Remove fish filet from brine and dry with paper towels. Form a pellicle on fish by placing in front of a fan for 3-5 hours or placing uncovered in fridge for 5-8 hours.