More than 280 years after it was damaged in a fire, one of the original copies of the Magna Carta is legible again. There were four copies of the document created at the time. One, held by the British Library, was badly damaged in a fire in 1731. That copy can now be read on a computer screen after scientists used multispectral imaging to decipher the text of the “Burnt Magna Carta” without touching or further damaging the delicate parchment.
Multispectral imaging is a process that photographed the burnt parchment, using a variety of LED lights, spanning the spectrum from ultraviolet to infrared, outside the range of human vision. The various images each produces a few clues to the original ink. By combining the multiple images, text that is invisible to the naked eye is suddenly visible.