The attempts at unrolling were a disaster, so they continued for decades during the 19th century, and perhaps into the 20th. The idea that there's metal in the ink *may have* arisen from the use of xrays to try to read the scrolls without trying to unroll them. Anyway, AFAIK, all the known texts are from epicurian philosophy (oh boy), and are mostly otherwise unknown works. There's been some wishful thinking in recent years that, perhaps, since the house turned out to have a another storey, perhaps there's a second library, and in *that* one, perhaps there are some more desirable texts, like, oh, lost histories and whatnot. That would be nice, but there's probably no second library in the house.
Was one of the arguments against the Turin Shroud that the “ink” on the Shroud had metal in it and such did not exist two millenia back?