Vertically Stitch

An earlier sketch revealed a font glyph column by column, and the study rejected it: nothing in the real process ever reveals a pre-existing letter. A strand engine costs more, but it makes the entrance honest and gives the exit something to run backward through. The face still matters, as it does in the shop, where the customer picks a font sample and the sewer follows it by eye: so the path comes from a real typeface's skeleton, while the letter itself is only ever thread. A hand-drawn stroke library stays as a third style for comparison.

Two readings of the craft are both honest: a frontier moving down a fixed column (pen on paper) or a column walking past a fixed frontier (fabric under the needle, which is also what scrolling is). Mixing them reads as parody. The app ships the second, in a close view: the strap walks up under a needle that holds its height, and once the last strand lands the view eases out to show the whole piece, the way the eye leaves the needle for the finished strap, and stays out through the exit. The first reading, text arriving inside a fixed area, stays one URL parameter away, because the question is open.

The spec says enter and exit along the same path with mirrored easing, and unpicking is the only exit that does: the strands lift in the reverse of their order and the thread draws back out. It runs at 1.6 times the sewing speed, the Toast's precedent of an exit quicker than its entrance. Three other exits were built and compared by eye, cut and lift, fade and walk off; the app now ships unpicking alone and keeps the three behind a URL parameter, with the comparison recorded in the study brief.

It is the text the shop sewed down a red strap in the frames the study read most closely: four characters, upright to the strap, a hairline span from one to the next. It is a public idiom rather than a customer's name, each language has its own form of it (광명정대, 公明正大, 光明正大), and between them the four characters exercise verticals, horizontals, hooks and a crossing.

Because that is how long it takes. Frame by frame, the gold Hanja reel sews a character in about five seconds at natural speed, which matches the machine's own cycle rate of up to two thousand stitches a minute against the strand counts here. One needle cycle is one strand, forty a second at 1x. The re-grip between characters, about half a second, and the shorter hesitation between components are read off the same reel. A loading state would run this at 4x; the study runs it true.

Because the machine has one. A zigzag needle swings along a single axis and the sewer steers the fabric under it, so the hatch never turns with the letter: a vertical stroke is crossed by the swing, a horizontal stroke is run along it. An earlier build laid each strand across its own stroke, which read as satin filled by software. The strands now share one axis, set in degrees from the machine's own left-right swing, and the thin horizontals the first build imposed as a factor now fall out of the geometry. The hand holding the fabric is not a fixture, so the axis carries a few degrees of play: a slightly different set at every re-grip, a slow drift along the stroke, a flicker from strand to strand. The app fixes the play at ±15°; at zero, one URL parameter away, the hatch is a machine's. A true zigzag would also tilt alternate strands by one stitch length; at the reels' distance that reads as parallel, so the app keeps them parallel.

Strand accumulation, the width envelope, thin horizontals, carried spans and the finishing pass were all seen in motion or stated by the shop in its own explainer reels. Stroke order inside a glyph is a heuristic: Hangul strokes are grouped by jamo region, Hanja and kana by connected part from top to bottom and left to right, and the reels never froze a syllable finely enough to check it. Gungseo is used only when the device has it; otherwise the vertical display face stands in and the app says so. A character no face can render is reported, never faked.