Steel vs. Paper: What We See After Ten Years in Client Archives
A comparison of seed phrase backup materials based on condition assessments during wallet archive reviews.
When we open a client’s archive envelope for the first time, the backup material often tells a story the holder did not intend to write.
Paper Backups
Laser-printed seed phrase sheets from 2016–2018 frequently show toner fading along the fold lines. Handwritten copies fare worse: ink from gel pens bleeds through cheap notebook paper when stored in humid conditions — common in Korean apartments without dehumidifiers running year-round.
We recommend archival-grade paper (ISO 9706 compliant) stored flat in acid-free sleeves, never folded. If you must fold, fold between words, not through them.
Steel Backups
Stamped steel plates generally survive better, but we have documented corrosion along character grooves on plates stored near bathroom ventilation ducts. One client stored a Cryptosteel clone in a fireproof safe that trapped moisture; three words became ambiguous under angled light.
Electrochemical engraving (done professionally, not hand-stamped at home) produces the most durable marks we have observed across a decade.
The Hybrid Approach
Our strongest archives use both: steel as the primary backup and paper as a readable reference copy stored in a separate location. The paper copy includes a diagram of the steel plate layout without reproducing the full seed.
What to Do Now
Pull your oldest backup out of storage. Read every word under natural light and a desk lamp. If any character requires interpretation, schedule a refresh before you need it in an emergency.