I've never handled sheet film or opened a box of the stuff. Obviously, when handling 35 mm or 120 film, there's very little to watch out for.

To avoid doing something foolish that I haven't taken account of, is there any advice members could give about how to deal with sheet film? This is a 25-sheet box of 4x5 Shanghai Film. I will be using a changing bag. From a video I saw, I understand that this brand comes in a box consisting of an upper and lower box section only: no third section. One concern of course is putting everything back in the box and making sure it would be light tight when it comes back out of the bag.

As a starting point, I want to remove a sacrificial sheet for handling in daylight, learning how to load in holders, etc.