<p>I use a blank frame or as describe using the area around the image and adjust until I get pure black through film base plus fog. If the film is over or under expose I may make an extra one adjusted until it looks good for viewing. If you don't get film base plus fog to print pure black you don't know what you have.</p>
<p>Nikon FM2n, 50mm f1.8 Nikkor, medium yellow filter, Kodak 400TX. Taken on a train ride form Bryson City, North Carolina to Dillsboro, North Carolina.</p><div></div>
<p>I have recently tried Kodak 400TX, the new designation for Tri-X. I have read that the film was reengineered in 2007. As for my own experience it seems to be an improvement from what I remember 20 years ago. If you haven't used it recently it is certainly worth trying. </p>
<p>Mike, I get out about twice a week because I still have a post office box. Your pictures of the local area have motivated me to get out and do more local photography. Keep up the good work.</p>
<p>If it is 120 use fp4+. It is a little expensive but check Ilford Lab U.S. if you are in the U.S. Their website will give you the information. I am using them until I can get a dark room up and running.</p>