Gold-Plated Flex Circuits (FFC/FPC/ZIF)

Look at the cable end edge-on under a lamp — recoverable gold sits only on the discrete exposed pads, and if pinkish copper glows through the yellow as you flex it, the gold is immersion flash a tenth the thickness of a mil pin.

Au 0.05–0.15 g/lb of cableCu ~100 g/lbBase 60–80% polyimide/PET + acrylic

eBay typical$10–40per lb

Refiner pays$0per lb

Metal in it$14.1per lb at 4 Aug 2026 spot

Confidencemedof the yield figures

How to spot it

Thin amber/orange polyimide or milky-white PET ribbon, 0.1–0.5 mm thick, with 4–120 conductors at 0.3–1.25 mm pitch and a stiffener at each end. ZIF connectors are 1–2 mm tall plastic bodies with a flip-up or slide-out actuator bar. Found on laptops, phones, printers, cameras, disk drives, LCD panels, dashboards and medical scopes.

Metal content

Metal	Quantity	Notes
Gold	0.05–0.15 g/lb of cable	Sub-micron immersion gold, realistically 0.05–0.2 µm, over only 1–3 cm² of exposed pad at each end
Copper	~100 g/lb	Rolled-annealed traces, 15–30% of cable mass
Base metal	60–80% polyimide/PET + acrylic	Refiner-hostile; several reject flex outright

At 4 Aug 2026 spot prices that works out to $14.1 per pound of contained metal — Gold 0.1 g = $13.1, Copper 100 g = $1.07. A refiner paying $0 returns about 0% of that, which is normal: refining costs money and the buyer takes a margin.

Safe removal

Working temperature: No heat needed; ZIF actuator release

Flip the ZIF actuator up and pull the flex straight out; never yank a latched cable. For scrap, shear the plated end tabs off — the middle of the run is bare copper under film and dilutes the grade badly. The several-micron nickel underlayer is the real chemical obstacle and consumes far more reagent than the gold it covers.

Hazards

💨 Fumes, ventilation and open flame

NEVER burn boards, wire insulation or plastic. Ever.

🪚 Fibreglass and board dust

NEVER dry-cut boards indoors without extraction.

⚗ Home acid refining

The practical answer for nearly everyone: sort, concentrate, and sell to a licensed refiner. A good refiner recovers 85–98%, assays rather than guesses, pays on the assay, and takes the waste liability. Your edge as a scrapper is identification and sorting — not chemistry.

Before you scrap it

Yes, and usually the only sensible outcome — 50–300×. Specific FPC cables are repair-critical and unobtainable; a laptop LCD or camera flex sells $5–25 against $0.08 of gold. Photograph the printed part number; scrap only cracked, creased or torn cables.

The common trap

Gold-coloured flex looks like a ribbon of gold and is the classic beginner's purchase. Two compounding errors: the gold is 2–8 µin, a tenth to a twenty-fifth of a mil pin, and buyers weigh the whole cable including a foot of bare copper trace when only ~2 cm² at each end carries gold. Shear the ends first, then weigh — and even then it is marginal.

Questions

How much gold is in gold-plated flex circuits (ffc/fpc/zif)?

Gold: 0.05–0.15 g/lb of cable. Copper: ~100 g/lb. At current spot that is about $14.1 of contained metal per pound.

How do you identify gold-plated flex circuits (ffc/fpc/zif)?

Look at the cable end edge-on under a lamp — recoverable gold sits only on the discrete exposed pads , and if pinkish copper glows through the yellow as you flex it, the gold is immersion flash a tenth the thickness of a mil pin.

How do you remove gold-plated flex circuits (ffc/fpc/zif) safely?

Is gold-plated flex circuits (ffc/fpc/zif) worth more working than as scrap?

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