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A heated die presses a metallised polyester web onto the // headline's terminal word and a rule frame around the primary button; the // web is a stack (PET carrier / release coat / lacquer / vacuum-metallised // aluminium / heat-activated size) that only transfers above a hard DUAL // threshold — temperature AND pressure both have to clear their floor in the // same pixel, or nothing sticks there. That is this component's whole // identity and what separates it from its nearest neighbour in this round, // structure-quoin-lockup: quoin-lockup's variable is PRESSURE distributing a // layout (composed metal type, a bed the whole page rests on); foil-block's // variable is a TRANSFER THRESHOLD deciding whether a mark takes AT ALL, and // it never renders a bed of type — only a headline word and a button frame // get struck. // // MECHANIC: die temperature is 118degC everywhere inside the die's own // outline, falling linearly to 109degC over the outer 6px of that outline (a // die perimeter runs cold in the real process). Contact pressure is a // continuous field of 3 drifting gaussian lobes, +/-0.11MPa about a 0.42MPa // mean, drifting at 0.014Hz — nothing about it resets between strikes, so // two consecutive strikes fail in different places. A pixel receives foil // iff T >= 96degC AND p >= 0.34MPa: a hard threshold, no soft ramp, which is // what produces the ragged cold-edge void pattern instead of a clean fill. // The mask is evaluated once, at dwell end, and held through peel/index/idle // — it does not re-evaluate every frame. // // STRIKE CYCLE, 4.60s: approach 420ms (die descends, ease-out cubic) -> dwell // 300ms (the die closes its last 1.5px of travel under load; mask evaluated // at dwell end, t=720ms) -> peel 280ms (die lifts the whole 280ms; the last // 90ms the carrier still clings and the foil edge stretches as hairline tail // filaments) -> web index 3600ms, the ENTIRE remainder of the cycle. The web // can only be held still while the die is down, so it feeds continuously for // every millisecond the die is up and advances exactly one hole pitch per // cycle. An earlier cut indexed for 1550ms and then sat idle for 2050ms, // which is what read as the band stopping and starting again: 45% of every // cycle had no moving part at all. The spent web is this component's resting // loop: it carries the negative record of the last strikes (alpha 1.0 -> // 0.5) and keeps indexing with zero input, which is what makes the band // alive at rest. It is deliberately NOT the only thing moving — an // unconditional specular band sweeps at 0.19 cycles/s across every // transferred area regardless of the strike cycle, foil's directional // vacuum-metallised anisotropy, and the make-ready pressure field differs // strike to strike, so the mature (already-struck) region is never a still // image sliding under a moving band. // // TRANSFERRED FOIL IS PERMANENT. It is on the stock; the next impression // cannot take it back off. An earlier cut called clear() on the mask at // every approach, so the struck word dropped to bare unfoiled type for the // 720ms of approach + dwell and then snapped back — the visible restart. // What a re-strike changes is WHERE the voids fall, because the pressure // field has drifted, so a strike now reads as the void pattern re-rolling // under a descending die rather than as the word blinking out. // // ACCESSIBILITY: canvas is aria-hidden. The headline is a real, always-legible // heading — its terminal word is given color:transparent ONLY once a 2D // context is confirmed live, so a canvas failure leaves plain readable text, // never a gap. 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{lead ? `${lead} ` : ""} {/* the terminal word rests at muted value — the foil that lands on it is the bright event, and near-equal values would make the transfer invisible */} {last}