So cool! Congratulations to the team. When scroll 4 (PHerc 1667) was first published, it was clear that the sheets were less compressed than the first two scrolls, so it would be easier to segment the surface. However, the whole surface looked similar to what the ink had looked like in scroll 1 where letters were first discovered.

But the team persevered and scanned at higher resolutions and eventually found letters: https://scrollprize.substack.com/p/finallyletters-in-scroll-...

Now they've managed to bring out the ink across the whole scroll. Truly inspiring, can't wait to read up on how they did it.