In light of the recent report on unpublished early Christian manuscripts from the Oxyrhynchus collection, it may be worth revisiting an old video. In 2006, the PBS television program Nova: ScienceNow presented a segment on the use of multispectral imaging (MSI) on ancient manuscripts, including some in the Oxyrhynchus collection.
Toward the end of the video, the host discusses what looks like a poorly preserved fragment of a parchment leaf that is basically illegible. The video then shows “before and after” images, demonstrating what the MSI process can reveal:
The nomina sacra ⲕⲩ and ⲭⲣⲥ are quite clearly visible in the MSI image. The fragment is said to contain (at least) Romans 14:7-9 and is described as being datable to the late second or early third century.