Originally Posted by Peckish
When I discovered them over a year ago, and did some research, nowhere did I read that they are acid-free and archival, which is what killed the idea for me.
Pilot's website actually says that all their gel ink is acid free and archival. I emailed them for clarification, and since these are made with their gel ink, yes, they are too.
I won't be using them on dark fabrics without testing though...