I enjoyed Dean Mullin’s description of the IB printing process but have one clarification. The print stock was, in fact, a light sensitive black and white print stock made by Kodak. It may have been designated 5307, as 5302 was the standard black and white print stock of that era. This was necessary in order to photographically apply the optical sound track to the print. That was printed and developed in a typical darkroom environment so what came down through the ceiling into the dye transfer room at Technicolor was a clear strip of film except for the sound track and one edge onto which was printed footage numbers.
