Based in Guangdong, the world’s premier jewelry manufacturing hub, JIAINUS combines meticulous craftsmanship with a deep understanding of the global piercing market.
I am Kailee, the founder of JIAINUS. With over 5 years of deep engagement in the jewelry industry, I have mastered the intricacies of both B2C and B2B sectors.
My journey has allowed me to serve a diverse range of global clients—from individual enthusiasts to professional piercing studios. This unique dual-perspective ensures that every piece we provide is not only a high-quality product but also a market-ready solution tailored to your specific business model.
Implant-Grade Titanium: Engineered for professional standards. Our F136/G23 Titanium is biocompatible and high-polish, meeting the strictest safety requirements for body jewelry.
From raw alloy to finished jewelry — our complete manufacturing process
Designers create precise 3D digital models using CAD software. Every dimension, curve, and surface finish is defined — renders are reviewed and approved before tooling begins.
CAD · 3D Render · Approval
A master model is hand-carved or CNC-machined. It is vulcanized between layers of rubber under heat and pressure, creating a reusable mold capable of producing hundreds of identical wax copies.
Vulcanized Rubber · ~150°C
Molten green casting wax is injected into the rubber mold under vacuum pressure using a digital wax injector. Each pull produces an exact wax replica of the jewelry piece.
Vacuum Injection · Digital Machine
Freshly injected wax pieces are removed from the mold and trimmed by hand to remove seam lines and flash. Each piece is inspected for dimensional accuracy before tree assembly.
Hand Trimming · QC Check
Individual wax pieces are attached to a central wax sprue — the "tree" — using a heated wax pen. Multiple pieces per tree maximize casting efficiency and minimize material waste.
Wax Pen · Tree Sprue · Batch
Flasks packed with investment plaster are fired at 600–750°C for several hours. The wax melts and vaporizes entirely, leaving a perfect negative cavity ready to receive molten silver.
600–750°C · 4–8 Hours
S925 sterling silver is melted to approximately 960°C. Molten metal is poured into the hot flask under centrifugal or vacuum pressure, forcing silver into every fine detail of the mold. The flask is then quenched in water.
960°C · Centrifugal Cast
The investment plaster is broken away to reveal the silver casting tree. Workers use precision nippers to clip each piece from the sprue branches. All stubs are filed flush to the jewelry surface.
Nippers · Filing · Deburr
Each piece is refined using rotary tools, needle files, and abrasive discs. Casting marks are removed, seams smoothed, and edges shaped to match the original design specifications precisely.
Rotary Tool · Needle Files
Pieces are loaded into large industrial tumbling machines with stainless steel shot and burnishing compound. Hours of tumbling removes micro-burrs and creates a consistent base polish across large batches.
Steel Shot · Burnishing · Batch
Polished pieces are hand-sorted by style and size. Clasps, jump rings, and earring posts are attached. Workers connect all components with precision pliers, ensuring every closure is secure and aligned.
Hand Assembly · Findings
Skilled setters place gemstones — CZ, natural stones, or enamel — using prong, bezel, pavé, or channel techniques. Each stone is secured tightly and inspected under magnification for alignment and seat integrity.
Prong · Bezel · Pavé · Channel
Pieces are mounted on plating racks and submerged in electroplating baths. Rhodium plating provides a bright white tarnish-resistant surface. Gold vermeil (minimum 2.5µm) is applied for gold-tone finishes.
Rhodium · Gold Vermeil · 2.5µm+
Every finished piece is examined under magnification. Technicians check stone security, surface uniformity, plating thickness, dimensional accuracy, and hallmark stamping. Any piece failing inspection is reworked or recycled.
Visual · Dimensional · Stone Check
Each approved piece is stamped with the S925 hallmark confirming sterling silver purity. Pieces are cleaned ultrasonically, wrapped in anti-tarnish tissue, and packed for wholesale or dropship dispatch worldwide.
S925 Stamp · Ultrasonic · Dispatch
