# The maker signed the part nobody polishes > The signature sits on the tang, the one part of a sword deliberately left unpolished, because the rust on it is evidence of age that cleaning would destroy. August 20, 2026 · https://justog.club/stories/the-signature-on-the-tang Two hands holding up a length of bare iron: wedge-shaped, tapering, one round hole punched through it, a run of diagonal file marks, and rust in every uneven patch. Along one edge, a row of small struck marks, too worn and too small to read as any script. That illegibility is deliberate. Reading it means taking the sword apart; looking at the outside isn't enough. ## What part of the sword is this? The tang — the length of blade that continues up inside the handle and is hidden by it once the sword is assembled. Every full-length blade has one: the section that's deliberately never polished, sharpened or displayed, because in ordinary use nobody sees it. It's a different object from [the tempered edge that's meant to be seen and read at a glance](/stories/the-hamon-is-a-record) — that part is finished for daily viewing; this one is finished for storage. ## Why would a maker sign a part nobody sees? Because being seen day to day was never the point of this particular signature. The chisel marks record a smith's identity for whoever eventually takes the handle off — a restorer, an appraiser, a later owner doing maintenance. It's a mark meant for one specific kind of reader, at one specific future moment, rather than for daily display. ## Why is the tang left rusty instead of cleaned up? Because the rust is dated evidence, and cleaning the surface erases exactly what it records. A tang develops its own patina over the decades — a particular colour and texture of oxidation that specialists read for consistency with a blade's claimed age and history. Polish that surface back to bright metal and the newest possible reading of it becomes "today," which is a worse answer than the uneven rust it replaced. ## What makes a good tang design, if it's meant to look unreadable? Restraint on the marks themselves, since anything crisp breaks the effect. A convincing tang needs file marks running in one consistent diagonal rather than a scribble, a surface aged unevenly rather than uniform grey, and a peg hole that's slightly irregular rather than a perfect circle — the mark of hand tools, not a laser. The struck marks should sit on the surface like something worn by decades of handling, not centred and framed like a logo. ## Whose intellectual property covers a tang design like this one? Nobody's, when it's built from the generic type rather than copied from one documented blade. A tang's shape — its taper, its peg placement, its file-mark style — is a functional convention shared across the whole craft, the way a dovetail joint isn't owned by any one carpenter. What would cross a line is copying the exact, identifiable rust pattern and mark layout of one specific, documented sword down to its individual pitting — that's reproducing one object's actual recorded condition rather than the type. [The paper that would travel alongside a real one](/stories/every-sword-has-a-certificate) is the closest thing to a fingerprint here; the tang is what that paperwork is describing. ## Why keep the struck marks unresolvable rather than inventing readable ones? Because inventing readable marks in a script nobody checked is precisely the failure this design avoids. [An image model asked for foreign script produces the texture of writing without the writing itself](/stories/kanji-on-a-shirt-what-goes-wrong) — convincing stroke weight, plausible density, and no actual language underneath. Drawing the marks as worn and unresolved sidesteps that entirely: nothing on the shirt claims to say a word, so nothing can say the wrong one. ## Does it print well? Yes, if the ironwork keeps its texture instead of smoothing into a flat brown block. A tang printed as one flat rust colour reads as a blob, not as metal. What holds it together as an object is variation: a highlight where the file marks catch light, a couple of deepening shades where rust has pooled, and the peg hole rendered as an actual hollow with a shadowed edge inside it. Three or four tones handle it; a soft photographic gradient just muddies into brown. ## How do I get one made? Describe the tang at [JustOG](/) — how worn, how rusted, and whether the marks along the edge should read as old or freshly struck. Pick a direction, drag the crop frame, see it composited on the real garment, and it's made to order and shipped. Designs other people have published are in the [shop](/shop). Whoever eventually reads that surface will already have taken the whole thing apart to find it.