Archival pages are designed to take 7 strips of 5 frames, or 6 strips of 6 frames. So why do labs inevitably cut the negative into strips of 4? I like to archive each roll on its own page. I'll even waste a couple of frames so I get 35 frames (7 x 5) instead or 36 or 37. If a roll of 36 gets cut into strips of 4 then I have to use two pages and a lot of space gets wasted. They will even start off a roll with a strip of 2 then finish it up with another strip of 2. I've even had them include a strip of 2 from the middle of the roll. I've given the labs special instructions like "cut in strips of 5" or "do not cut." In my experience these have a high probability of being ignored.