If you could look at the inside of any fine ring under magnification, you would find the work of soldering: a nearly invisible seam where two pieces of precious metal were flowed together. Soldering is one of the most repeated operations in a jewelry workshop, and it is also one of the easiest places for a low-quality piece to give itself away. Good soldering disappears into the design; bad soldering cracks, darkens, or bulges.
Soldering is not welding
Customers often say "welded" when they mean soldered, and the distinction matters. In jewelry soldering, the two base pieces of metal stay solid. We introduce a third material, solder, which is an alloy of the same metal family formulated to melt at a lower temperature than the piece itself. When heated, the solder flows into the narrow gap by capillary action and solidifies into a strong joint. The original ring metal never melts. True welding, where the base metals themselves are fused under heat, is a different process used in specialized repairs and in some platinum work, but it is not how most rings are built.
Solder comes in hard, medium, and easy
A workshop keeps grades of solder with progressively lower melting points. The first joint in a ring is made with hard solder (highest melt temperature). The next joint uses medium, and the final detail uses easy solder (lowest melt). This ladder is what lets us build a piece in stages without melting the seams we already made. A ring band, a setting head, a gallery rail, and a decorative detail might all be soldered at different heats in sequence. Getting the order right is half the craft.
Flux, heat, and the pickling step
Before we touch a flame, the joint is coated in flux, which keeps the metal surface from oxidizing at high heat and helps the solder flow cleanly. The jeweler uses a fine torch tip and moves the flame evenly across the whole area, not just the seam, so the piece heats uniformly instead of scorching one spot. The telltale moment is the "flash": the solder suddenly melts and pulls into the joint. Immediately after, the piece goes into a warm acid bath called pickle, which dissolves the oxide and flux residue. It comes out looking raw and silvery, ready for filing and polishing.
Why the seam tells you the quality
A well-soldered joint is slightly proud of the surface and can be filed smooth so that, after finishing, you cannot see where one piece ended and the other began. A poor joint shows itself in predictable ways: a visible bump or depression, a darker line, a grainy pebbly texture, or a seam that sits proud because no one bothered to file it. Over time, weak joints open up, which is exactly how prongs loosen and stones go missing. When we inspect incoming repair work, the solder seams are one of the first places we look.
What this means for custom pieces
Because soldering joins real metal, it is the reason a hand-built ring can be resized, repaired, and rebuilt across generations. A piece that is cast as one solid lump has its own strengths, but a fabricated, soldered construction is what allows us to mix a shank in one profile with a setting head in another and to refine details by hand. It is also why our finishing process matters: the seam only disappears after hours of filing, sanding, and polishing.
How it wears over time
A properly soldered joint is as strong as the surrounding metal. It will not break under normal wear. What does fail is a joint that was cold-soldered (heat too low, so the solder just sat on top), or a joint on a ring that has taken repeated blunt force. If you ever feel a rough spot inside a ring band or see a faint line you did not notice before, bring it in. Early soldering repair is a five-minute bench job; ignoring it until the band cracks is a full rebuild. That is the practical side of the craft: every seam we make today is a seam that either holds for a lifetime or comes back to us for a fix.
Common questions clients ask at the bench
How long does a soldering repair take? A simple prong re-solder or a broken chain link is usually a same-day bench job. Resizing a ring that requires soldering on a new section of shank takes a day or two, because the new metal has to be filed, shaped, and polished to match. Will I see the solder seam? After proper filing and polishing, no. The seam should disappear into the surrounding metal. If you can see a line after repair, the job was rushed. Can any metal be soldered? Within its own family, yes: yellow gold solders to yellow gold, white gold to white gold, sterling to sterling. Joining different families requires special solder and is usually done only in repairs, not in original construction. Does soldering weaken a ring? Done correctly, the joint is as strong as the metal around it. Done cold, it fails within months. That is why we inspect every seam under magnification before a piece leaves the bench.
International fineness and hallmarking requirements for precious metals are defined in the ISO standard for jewellery and precious metal fineness.
Related reading: Mokume Gane Jewelry: Layered Metal Patterns at the Bench, Granulation in Jewelry: Tiny Metal Balls, Big Craft, Filigree at the Bench: How Fine Wire Jewelry Is Made.
Frequently Asked Questions
What ring sizes can you supply in bulk?
US sizes 5–12 including half sizes. Send a size breakdown with your order and we cast to that curve; comfort-fit inner bands reduce resize requests.
Can I order a mixed size run instead of one size?
Yes. Mixed runs are standard for wholesale: specify quantity per size and we pack and label by size at no extra labor cost.
What is the MOQ for custom ring designs?
50 pieces per design for existing molds; 100–300 pieces when a new mold or CAD model is required.
How should I price rings for retail margin?
Most partners use a 3–4x markup on FOB cost for sterling and 2.5–3x for moissanite solos, which keeps landed cost under 30% of retail.
