Computational flattening algorithms have been successfully applied to X-ray microtomography scans of damaged historical documents, but have so far been limited to scrolls, books, and documents with ...

The letters had been folded using a mysterious technique. This is an Inside Science story. Unopened letters more than 300 years old that were folded using mysterious techniques have now been read for ...

Researchers at the MIT Libraries have managed to read a 300 year-old letter without even opening it. A computer-generated sequence of the letter unfolding. Image via ...

A letter posted more than 300 years ago from Paris to the Hague, but never delivered or opened, has been read for the first time through X-rays and computer algorithms, preserving the complex folds ...

Using an x-ray technique, MIT researchers have digitally unfolded and read 17th-century letters that had been “letterlocked” by their authors to prevent them from being read in transit. Reading the ...

Mary, Queen of Scots used a “spiral locking” technique to seal the last letter she wrote before her execution, indicating that she wanted the contents to remain secret, according to research published ...

An example of letterlocking – where people doubled letters as envelopes to ensure the security of a document – the fallen monarch used a spiral locking process to seal a message that was “a last will ...

Over recent years we’ve been treated to a series of fascinating advances in the world of x-ray imaging, as researchers have developed their x-ray microtomography techniques and equipment to the point ...

Abstract: In this section we will take a close look at twelve historical letters, written on paper from the 1580s to the 1970s, that demonstrate some distinctive features or techniques of ...

The rich history of a centuries-old document security technology—folding and securing a letter into its own envelope for delivery—and a comprehensive guide to learning how to make your own locked ...