There's a multitude of emulsions available, even after a lot of them have been discontinued. Each one reacts a little differently to light, both in terms of requiring more or less light, but also in terms of reacting in various unique ways to light.
I'm going to write out a proper entry about my exploration of IR film as part of my series black and white and how I explore it. But I'm in the midst of information to share, so I'm going to share my thoughts and news now and worry about writing out a proper chronology of exploration later.
I've been in a bit of a funk since Sunday morning when folks noticed Silverprint's post about HIE (High speed IR) and EIR (Ektachrome IR) being discontinued. At least this time, somebody gave us warning about it. Naturally, it wasn't Kodak. Folks called Kodak. The first to call got positive news that it wasn't discontinued.... but everybody else was told that the last cut is next month.
I had Katherine over the other day because I wanted to take some portraits of her now that I know how to take portraits (See, she was one of my first portrait victims as well)