Kodak Tri-X Reversal Film is a high-speed panchromatic black-and-white film designed for reversal processing for direct projection and duplication. It features an anti-halation undercoating that benefits working in low-light and indoor conditions; however, it is also suitable for outdoor applications. Tri-X Reversal is also characterized by a fine grain structure and wide tonal range with smooth gradations between values.  I love this stuff.   Very fine grain especially for a 200 ISO speed film.  Below is a review of the film stock by a great Youtube contributor: Analog Resurgence.  I also have some great back issues of Super 8 Today magazine - a great print magazine resource for the Super-8 shooter (see my other listings).