Kodak Tech Pan differed from such films as Kodak ImagelLink, Agfa Copex. and other microfilms. If you look at Kodak's site for this film you must note that one of its intended purposes was for continuous tone picturial photography. This is not true of microfilms which are designed to provide high contrast images to clearly represent text. This makes it difficult to tame the contrast of these films for pictorial work.
It is somewhat paradoxical that grainless prints actually appear less sharp to the human eye than prints that contain some grain. This optical illusion is the idea behind such acutance developers as the Beutler formula and Neofin Blue which make use of edge effects.