The Soldering Process Explained: How Silver Chains Are Assembled

There’s a moment in silver soldering that never stops being nerve-wracking, no matter how many times you’ve done it. You’re holding a torch flame on a jump ring the size of a sesame seed. The flux bubbles, turns glassy, then goes clear. The silver underneath glows a pale orange. You’re waiting for the solder — a microscopic chip of metal balanced on the joint — to flash silver and flow into the seam. If you pull the flame away too early, the solder doesn’t flow and the joint is weak. If you hold the flame too long, the entire jump ring melts into a blob and you start over. The window between those two outcomes is maybe two seconds. I’ve been soldering for years and my heart still rate goes up every time.

Silver chain assembly is essentially this moment repeated dozens or hundreds of times. Every link in a handmade silver chain is a jump ring that’s been soldered closed, one at a time, by a person holding a torch. When you pick up a handmade chain and feel how smooth and flexible it is, you’re feeling the cumulative result of hundreds of individual solder joints, each one executed in that two-second window. I don’t think most people realize this. They see a chain as a single object. It’s not. It’s a series of decisions, each one with a chance of failure.

I want to talk about how silver chains are actually made, because the process reveals something about why handmade chains cost what they cost and why machine-made chains, while cheaper, are fundamentally different objects. This isn’t a tutorial — there are plenty of those. This is an observation from years of watching, doing, and occasionally cursing at the soldering bench.

Why Chains Need Soldering at All

A jump ring — the basic unit of most chains — is a circle of wire with a cut in it. If you don’t solder the cut closed, the ring can open under tension and the chain falls apart. An unsoldered jump ring will eventually pull apart if the chain gets snagged on something. So for any chain that’s meant to last, every link needs to be soldered.

Not all chains are soldered, though. Cheap fashion chains often use unsoldered jump rings that are just closed tightly with pliers. They hold for a while, but eventually the tension relaxes and the ring opens. Mid-range chains sometimes have only the clasp end soldered, because that’s where the most stress occurs. High-end and handmade chains have every link soldered. This is one of the main differences between a $30 chain and a $300 chain, and it’s invisible to the naked eye until the cheap one breaks.

The jewelry soldering used for chains is the same technique used for all silver work: you heat the metal until a lower-melting-point solder alloy flows into the joint by capillary action. But chains present a unique challenge: the links are tiny, they’re connected to each other (so heat travels from one to the next), and you have to solder each one without unsoldering its neighbors. It’s like doing surgery on a chain of connected blood vessels.

The Process: One Link at a Time

A handmade chain starts with wire. The silversmith draws the wire to the desired gauge, wraps it around a mandrel to form a coil, and saws through the coil to create individual jump rings. Each ring is a perfect circle with a saw-cut gap. The cut must be clean and flat — a jagged cut won’t close properly and the solder joint will be visible.

The rings get linked together one at a time. Open a ring, thread it through the previous link, close it with pliers. The closing is critical: the two ends must meet perfectly flush, with no gap and no overlap. If there’s a gap, the solder has to fill it, which creates a visible blob. If the ends overlap, they’ll never close flat and the joint will be lumpy. I spend more time closing jump rings correctly than I do soldering them. A well-closed ring almost solders itself; a poorly closed one fights you the whole way.

Once a ring is closed, it gets fluxed and a tiny chip of solder — maybe 0.5mm square — gets placed on the joint. The ring is laid on a soldering board, and the torch comes in. For chain work, most silversmiths use a small, focused flame — a Smith Little Torch with a #3 tip, or a butane micro-torch for very fine links. The flame dances around the ring, heating it evenly, until the solder flashes and flows. Then the flame pulls away instantly.

After soldering, the link goes into pickle (a warm acid solution) to remove oxidation, then gets rinsed. Then the next link is added, and the process repeats. For a 20-inch chain with 200 links, that’s 200 individual soldering operations. At maybe 30 seconds per link — positioning, fluxing, soldering, pickling — that’s nearly two hours of soldering alone, not counting the time to make the rings, link them, and finish the chain.

The Heat Management Problem

Here’s what makes chain soldering harder than soldering a single piece. When you solder link number 50, it’s connected to link 49 and link 51 (which is already attached). Heat travels through the silver from the link you’re soldering into its neighbors. If link 49 gets too hot, its solder joint can re-flow and the link opens. Now you have two problems instead of one.

Silversmiths manage this in a few ways. First, they use the lowest-temperature solder that will do the job. Easy solder flows at around 1,245°F, which is far enough below the melting point of sterling (1,640°F) that there’s a safety margin. But even easy solder can re-flow if the adjacent link gets hot enough.

Second, they work fast. The torch goes on, the solder flows, the torch comes off — total heat exposure of maybe three to five seconds. The less time the flame is on the metal, the less heat spreads to neighboring links. Speed is the chain maker’s primary defense against re-flowing previous joints.

Third, some makers use a heat sink — a pair of copper tongs or a wet sponge held against adjacent links to absorb heat and keep them below the solder flow temperature. This works but slows down the process, so it’s usually reserved for links where the geometry makes heat spread particularly problematic.

Fourth, there’s the sequence. A skilled chain maker knows which link to solder next to minimize the risk to already-soldered joints. They might work from the center outward, or build sections separately and join them. The sequence isn’t random — it’s planned based on which joints are most vulnerable to re-flow.

Machine-Made Chains: A Different Animal

Most silver chains sold today aren’t handmade. They’re produced on chain-making machines that automatically feed wire, form links, and close them. The soldering is done in bulk — the entire chain gets passed through a conveyor belt oven where solder paste on each joint melts simultaneously in a controlled atmosphere. This is how silver chain assembly works at scale.

The result is a chain that’s consistent, uniform, and cheap. Every link is the same size, every joint is soldered, and the production cost per chain is a fraction of handmade. There’s nothing wrong with machine-made chains — they’re practical, affordable, and perfectly serviceable for most jewelry. If you want a simple silver chain to hold a pendant, a machine-made one is a reasonable choice.

But machine-made chains have limitations. The wire gauge is usually lighter than handmade because the machine works best with thinner, more pliable wire. The solder joints, while consistent, are often more visible because the solder paste leaves a slight residue that polishing can’t fully remove. And the chain patterns are limited to what the machine can produce — usually simple styles like cable, curb, or figaro. Complex patterns like Byzantine, loop-in-loop, or braided chains require hand assembly.

What I’ve Learned from Soldering Chains

I don’t make chains commercially. I’ve soldered enough of them to know that I don’t have the patience for production chain work, and I respect the people who do. But I’ve learned a few things from the process that I think apply to anyone buying silver chains.

First, a soldered chain is only as strong as its weakest link — literally. If one link has a cold solder joint (where the solder didn’t fully flow), that’s where the chain will break. In a handmade chain, the maker can check each link. In a machine-made chain, quality control is statistical — they check samples, not every link. A bad link can slip through.

Second, the gauge of the wire matters more than the soldering. A thick-wire chain with unsoldered links will outlast a thin-wire chain with perfect soldering. If you’re hard on your jewelry, look for chain wire that’s at least 18 gauge (1mm). Delicate chains in 22 or 24 gauge are beautiful but fragile, soldered or not.

Third, soldering changes the color of silver slightly at the joint. Solder is a different alloy than sterling — it has zinc and sometimes other metals that lower the melting point. At the joint, there’s a thin layer of solder alloy between the two ends of the wire. This can show as a slightly different color or a line that’s visible under close inspection. A skilled maker minimizes this by using as little solder as possible, but it’s always there to some degree. It’s not a defect — it’s evidence of how the chain was made.

Fourth, chains stretch. Over years of wear, the links polish against each other and the joints wear slightly, lengthening the chain. This is normal and happens to all silver chains, handmade or machine-made. A well-made chain stretches slowly and evenly. A poorly made chain might stretch unevenly, with some links wearing faster than others, creating a visible irregularity.

The Quiet Skill of Chain Making

Chain making doesn’t get the same respect as other forms of silversmithing. It’s not as flashy as stone setting, as artistic as filigree, or as technically impressive as casting. It’s repetitive, fiddly work that requires patience and consistency more than creativity. But I’d argue that a well-made handmade chain is one of the most difficult things to produce in jewelry, precisely because it demands consistency across hundreds of identical operations.

When I hold a handmade Byzantine chain — each link woven through four others, every joint soldered, the whole thing flexible and smooth and perfectly uniform — I’m holding something that represents hours of focused, skilled labor. The maker didn’t get to be creative. They got to be precise, over and over, for hours. That’s a different kind of skill, and it deserves recognition.

The next time you pick up a silver chain, give it a gentle pull. Feel how the links move. Look at a few joints with a loupe. If you see a barely visible line at the joint, that’s the solder seam — proof that someone closed that ring and soldered it. If every seam is in the same orientation, the chain was handmade by someone who planned the joint placement. If the seams are random, it was machine-soldered. Neither is bad. But they’re different objects, made different ways, and knowing which you’re holding changes how you think about it.

Silver soldering is one of those skills that looks easy until you try it. The torch, the flux, the solder, the timing — it all has to come together in a few seconds, and the metal doesn’t forgive mistakes. When it works, the solder flows like water and the joint disappears. When it doesn’t, you’re staring at a silver blob and starting over. Chain making is this skill multiplied by the number of links in the chain. That’s why handmade chains cost what they cost, and why the people who make them have my complete respect.