- Alchemy (noun): a science studied in the Middle Ages which involved trying to change ordinary metals into gold.
- Medieval Manuscript: an old document or book written by hand in the Middle Ages (AD 600 to AD 1500).
- Pigment (noun): a substance that gives something a particular colour when it is present in it or is added to it.
- Corrode (verb): If metal corrodes, or if something corrodes it, it is slowly damaged by something such as rain or water.
Elements that change the colours in artwoks:
- Light exposure
- Atmospher Conditions