The psalter was in poor condition, due to the acidic peat bog which had, however, been responsible for preserving it. It was in visibly so bad a condition that someone in the
British Museum put a picture of the mass in a staff area captioned "if you think you have a bad day ahead ...". The National Museum of Ireland consulted with specialists in archaeological conservation and book conservation about the best way to conserve the psalter, and received partly conflicting advice. Ultimately a multi-phase conservation plan was determined. The first phase involved non-destructive examination of the psalter in the form in which it was discovered, e.g. photography, MRI scanning, and examination of the binding by book-binding specialists. In the second phase, experiments were done on 18th century parchments to determine the best way of drying waterlogged parchment. The most effective method involved soaking the parchment in
ethanol to replace the water, placing it between blotting sheets, and vacuum-packing it. In the third phase, this technique was tested on small fragments of the psalter, and found to be effective. Conservators then began applying this method to larger sections of the psalter, and found they could consistently achieve shrinkage of only 2–5%, against 75% on a small fragment that was air-dried. Dewatering was carried out over four years using a vacuum chamber to minimise shrinkage and decay. Then dismantling was carried out. The letters, written in
iron gall ink, were preserved better than spaces between letters, many of which had dissolved, so it was necessary after drying to piece them together in the right sequence. The process was described in a book from the National Museum of Ireland,
The Faddan More Psalter, The Discovery and Conservation of a Medieval Treasure published in November 2021. ==See also==