Iron Gall ink was used on both the Magna Carta and the Declaration of Independence. It can last for many centuries, unfortunately it can fade if exposed to stro

Iron Gall ink was used on both the Magna Carta and the Declaration of Independence. It can last for many centuries, unfortunately it can fade if exposed to strong sunlight, which is why the declaration of independence is so faded. https://www.pbs.org/wgbh/nova/transcripts/3206_charters.html https://www.pbs.org/wgbh/nova/transcripts/3206_charters.html