SP Ultra 4LF developer: Shelf Life
Can't believe it's been over a year since we introduced our SP-Ultra 4LF! One of the only developers optimized for large format film in the last decades.
Here's the latest data (click on the chart to open it in a new window):
Boring. Boring is good. Indeed, the results are well within the expected limits of our test equipment, shutter accuracy, and everything else that affects the analog world. (Note that all test shots were taken using the same camera, lens and lighting setup.)
We're confident claiming a one year shelf life for SP Ultra 4LF. Of course, a lot of the credit goes to the Mylar pouch that keeps out oxygen. In fact, a glass bottle is about the only better container. However, you can't squeeze the extra air out of a glass bottle like you can with our pouch.