I recently got a Speed Graphic and bought some Arista 100 edu sheet film to learn on. I did a lot of research to try and make sure I could learn all of the correct steps to make sure that I would be able to take a picture. After the few test pictures I've taken I developed first using the taco method in a Patterson tank and my two sheets turned out entirely clear. I figured this was just due to not really knowing what I was doing when using the taco method so last night I developed in trays just one sheet to test and using D-76 to develop with. Again after I was finished my sheet was clear. I have been developing black and white 35mm and 120 for awhile so stumped as to what I'm doing wrong. Is it in the development process or during the picture taking? Is the film possibly bad? Thanks!