For those who have hoarded some 4x5 Kodak IR sheet film. ISO 400, #25 red, Zone III deep shadow placement, HC110 @ 6 mins-68*f. deep tank w/hangers. Pulled out/re-emersed in tank once every 1 minute. This gives normal contrast range with highlight halation. ISO 50 w/#25 red or #87b with zone III as deep shadows and 5 minute development time gives really dense grainy results. Print with a very hard filter for maximum grain in print.