What is the minimum sample policy for new brass designs?

There is no reliable universal sample quantity for every new design. A factory may recommend one development sample for dimensional and visual review, while a buyer may need additional pieces for wear testing, photography, buyer presentations, or color comparison. The practical minimum depends on whether the pair is treated as one approval unit, how many finishes are required, and whether the design uses new tooling. Confirm the unit definition in writing so a quoted sample quantity is not confused with the number of physical pieces needed for approval.

A new mold or die normally creates a development step that should be separated from the physical sample charge in the quotation. The cost can reflect mold complexity, engraving, moving components, tolerances, and the number of revisions needed before the first acceptable piece. A buyer should ask whether tooling remains usable for the production order, what happens if the design changes, and whether the quoted sample was made from production-intent tooling. Treating tooling as automatically included is a common source of disputes between first-time buyers and factories.

One sample can provide an initial review, but it may not represent every production variable. Fit should be checked on the intended wearer or a suitable test form; plating should be assessed for color, coverage, adhesion, and contact areas; workmanship should be inspected around soldered or assembled sections, posts, backs, edges, and decorative details. If several finishes or component suppliers are involved, each relevant version may require approval. Record comments against photographs or a marked specification sheet, because verbal approval can leave color, tolerance, and assembly expectations unclear.

A revision can change the sample requirement when it affects the mold, dimensions, weight, earring mechanism, surface treatment, or plating route. Minor visual corrections may be handled within an existing development path, while structural changes can require new tooling or another pre-production piece. Buyers should consolidate feedback after inspecting the sample and identify changes by priority. Ask the factory to state which revisions alter cost or lead time before work begins; otherwise, an apparently small adjustment can create a second approval cycle and move the planned bulk schedule.

Yes, sampling should normally precede a bulk commitment when the design is new or customized. The sample allows the buyer to verify proportions, comfort, clasp or post function, finish, branding details, packaging fit, and compliance requirements relevant to the destination market. It does not replace production controls, because a single approved piece cannot prove that every bulk unit will be identical. The purchase order should reference the approved sample, tolerances, finish description, acceptable defects, and inspection method so the approval has operational meaning.

The buyer should request a clear quotation, sample description, material and finish details, dimensions or tolerance notes where relevant, tooling terms, estimated lead time, revision terms, and approval instructions. If market regulations require testing, define the requested scope and responsible party before ordering; do not assume that a factory quotation includes every report. Product photographs, a sample approval record, and a final specification sheet are useful for controlling the transition from prototype to bulk order. Any stated RoHS or REACH requirement should be matched to the applicable material and documentation needed for the destination market.