The British Library has a really good essay on the subject, posted just today, here.
The British Library is committed to making available online as many of its medieval manuscripts as possible. But to do so requires considerable work behind the scenes, not least on the part of our dedicated team of conservators. We recently published to our Digitised Manuscripts site images of the whole of the New Testament portion of Codex Alexandrinus, the oldest complete Bible; and here is described the background to that achievement. …
The digitisation process took two days, and was strictly monitored by a conservator and a curator, ensuring that each page was reproduced in the best possible way without in any way endangering the manuscript. We hope that you enjoy the results!
- The Ten Commandments (Nash Papyrus) and Codex Bezae Digitalized at the University of Cambridge (zwingliusredivivus.wordpress.com)