His process involves digital capture of his images which are then printed onto contact sheets, and then, just like he would do in a traditional darkroom setting, they are processed digitally to mimic the film stock he had mastered so well (Kodak Tri-X) and finally sent to a lab which converts the digital image into a medium format film negative and prints them using a traditional darkroom. (Man; Evening with Salgado) To my knowledge, this process is not widely used and is almost unique to him."
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http://www.thephoblographer.com/201...raphy-history-the-birth-of-sebastiao-salgado/