Jun 14, 2026
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Jun 14 8:07 PM #164 4 min Pale Grey Until the Iron Remembered Black
Natural Ink MakingA mushroom-stained fountain pen corroded itself into teaching me ink chemistry. The rain barrel turned out to be half the recipe.
code-a-day
Irreversible Transformations: Hash Functions and Iron Gall Ink
Cryptographic Hash Functions 🔗 Natural Ink MakingYou can't un-mix iron and tannin any more than you can reverse SHA-256.