William Schryver wrote:Chap admits that a thickness of .05 mm will permit a ~1200 cm scroll. OK, so maybe the papyrus was really .10 mm thick (and until I see Chris prove that Ptolemaic-era papyrus was always 5x to 8x thicker than New Kingdom papyrus, I will remain unconvinced.) A thickness of .10 mm, by Chap's own admission, will permit a scroll of ~600 cm. That's about 20ft.!
I suppose there may be a difference between the thickness of the papyrus itself as measured with a micrometer and the thickness of a wrapping of the scroll as determined mathematically, since a wrapping may include some air space and the papyrus may not be a unifrom thickness all over. If so, it's the latter number (which is what Chap and I are working with) that's important for our present purposes. But on the increase of thickness of papyrus in the late period, see here. For the thickness of the DSS papyri as about .8 mm, see here.
Best,
-Chris