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HomeJewelry InformationLectureCasting Method for Brass Products at wholesale jewelry market

Casting Method for Brass Products at wholesale jewelry market

Casting Method for Brass Products at wholesale jewelry market. When you visit Wholesale market, you often hear the words “casting” and “cast products.” Reading this content will help you understand why many manufacturers say the minimum production quantity per design is 200-300 pieces when they are out of stock.

It will also shed light on why products made with Brass are more expensive than those made with Zinc,lead.

Casting Method for Brass Products

Create a basic rubber mold for preliminary work (creating a prototype similar to the actual design) using a rubber sheet. Place the product (sample) that will serve as the mold for the product on the rubber sheet and press it (+ heat) to create a mold in the shape of the product on the rubber sheet.

Inject wax into the rubber mold that has been created to match the shape of the actual product.

Casting Method for Brass Products,wax mold for jewelry production

This Casting Method for Brass results in a wax model that replicates the product’s appearance, paving the way for mass production of identical designs. The wax models are individually removed and cut from the rubber mold.

cubic product through the process

During this preliminary stage, a person manually attaches each cubic zirconia (CZ) to the wax model. This is a delicate process, making the production of such items challenging in Korea. Due to the manual attachment of CZs in the preliminary stage, labor costs are inevitably high.

The wax models, each with attached CZs, are assembled on a central structure to create a structure resembling a wooden grapevine. This structure is commonly referred to as “podo-song-i” (grapevine).

The reason for creating this grapevine shape is that the wax model, made from Brass, will emerge in the same grapevine shape.

wax mold for jewelry productions


Place the assembled grapevine into a container known as “kkang” in the industry.

wholesale jewelry production

Pour plaster into the container, creating a solid block. The block will contain the wax models made in the preliminary stage. This step explains why wholesalers need to produce a minimum of 200-300 units for each design, as numerous wax models are embedded within a single block.

Inject molten Brass material into the block, causing the wax models to melt away, leaving behind the desired product shape filled with liquid Brass material. The resulting product is no longer a wax model but a product made with Brass. The individual products are then manually separated from the grapevine structure.

Cut each product from the Brass grapevine. Due to the rough surface resulting from the cutting process, the products undergo additional processes known as “garang” and “ppawoo (grinding)” to smooth the surface.

Garang: Involves placing the product in a cylindrical chamber containing stones or sand. Rotating the cylinder smoothens the surface of the product.

Ppawoo(grinding): Involves a person holding each product on a rotating platform, ensuring it adheres closely to the surface and becomes smooth. This process is similar to what you might observe in a shoe repair shop with a rotating platform.

After these Casting Method for Brass products with attached cubic zirconia are obtained, marking the pre-plating stage. These products are sent to Korea as semi-finished goods and undergo plating locally before becoming finished products.

Understanding why it takes a long time to produce and hesitations in production when wholesalers have no stock becomes evident if they need to follow this process:

No stock
→ Request production at a Chinese (Vietnamese) factory
→ Pressure to produce 200-300 pieces per block, making it challenging to produce due to the burden (if the burden is high, production may not be feasible)
→ Import to Korea → Some products are stored before plating, while others are plated
→ Plating of semi-finished products upon order
→ Delivery to retail stores after 2-3 days.

This production method is also used for gold and silver products, but for mass-produced gold and silver items, smaller quantities (10-30 pieces) can be produced per block. However, high-end jewelry is crafted one by one through manual labor.

This can be considered a condensed version of the Brass production process. Some silver wholesalers state that if you want to order, a minimum of 30 pieces per design is required. It seems that, for such wholesalers, 30 pieces are simultaneously made in one block.

If a wholesaler claims to produce in a manner similar to gold and silver, those unfamiliar with this process might perceive it as a unique differentiation in the production process. In reality, it could be a common practice.

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