Why pencil beats ballpoint for seed phrases
The ink choice you make today affects legibility a decade from now.
A client brought in a card written with a gel pen in 2020. By 2025, the ink on the folded crease had faded to grey. Words six and eleven were guessable only with magnification and good light.
Graphite versus ink
Pencil graphite bonds mechanically with paper fibres. It does not fade with UV exposure the way dye-based inks do. For recovery material intended to sit in a drawer for fifteen years, pencil on acid-free paper is the conservative choice.
Ballpoint and gel pens use oils and dyes that can migrate, especially along fold lines or where the pen paused mid-stroke. If you already wrote your phrase in pen, do not panic — but consider re-writing on archival stock as a second copy.
Practical recommendations
Use a soft pencil (B or 2B) on paper rated for at least 75 years of storage. Press firmly enough that the graphite embeds visibly but without tearing the fibre. Store flat, not folded.
If you engrave on steel as your primary copy, keep a pencil copy as a secondary. Steel survives fire; pencil survives the moment you need to read the steel in dim light and compare character by character.
When we see this in sessions
Roughly one in five clients has at least one pen-written copy with legibility concerns. We flag it in the holder report and suggest a re-write during the session if time allows.