Give the product one controlled identity
Start with buyer and supplier names, buyer SKU, supplier item code, product name and revision. Put the same identity on the drawing, bill of materials, sample label, artwork and purchase order. A clear system such as FWN-0718 Rev C is safer than filenames such as final-new-2. Record the issue date, owner and approval status so production teams can distinguish a draft from the released version.
Define document precedence. A practical order may place signed amendments above the purchase order line, controlled drawing, bill of materials, approved sample and reference photographs, but the buyer should choose and state its own sequence. When two documents conflict, the affected work should stop for written clarification. Uncontrolled chat images should not silently override the released pack.
Describe the pearls with measurable fields
Identify the material as cultured freshwater pearl and state treatment status or required disclosure based on the actual product and destination market. Define size and measuring direction, shape, color, luster, surface, matching and drilling. Grade names may remain as a supplier reference, but they do not replace the measurable and visual boundaries used for acceptance because grading systems are not universal across sellers.
Use controlled samples to communicate natural variation. A center sample can show the intended appearance, while boundary samples can show the least acceptable luster, surface or shape for a particular design. Record what each sample controls and where the written tolerance takes precedence. Include full-batch evidence requirements when remote approval is part of the production workflow.
Build a line-by-line bill of materials
List every component needed to produce and pack one saleable unit. Fields can include item number, internal or supplier code, description, material, finish, dimensions, quantity per unit, approved supplier, revision and reference document. Separate pearls, clasps, posts, backs, jump rings, chains, thread, wire, adhesive, tags, pouches, boxes, inserts, labels and master-carton materials rather than hiding them inside one finished product line.
The BOM should distinguish fixed requirements from approved alternatives. If an alternate clasp, cord or box is acceptable, give it a separate code and state when it can be used. Do not use same or equivalent as an uncontrolled substitution rule. Component changes can affect function, metal declarations, finished length, artwork, packaging fit and cost, so the buyer should review the impact before authorizing production. Record the quantity basis clearly, including whether consumption is per piece, pair, strand, set or package, and state any controlled allowance for process loss separately from the saleable quantity.
Add drawings, dimensions and construction steps
Provide front, side, back and detail views as needed. Dimension finished length, pearl layout, clasp, post, drop, connector spacing, drill hole and logo placement. State the measuring condition and tolerance for each critical dimension. A drawing should communicate relationships, while the BOM identifies the actual parts. Link both documents through matching item numbers and revision codes.
Describe the build sequence where technique changes the result. Examples include knot pattern, stringing direction, adhesive preparation and cure, ring closure, pearl orientation and final cleaning. Focus on controlled outputs and critical process points rather than attempting to write a generic craft tutorial. Include prohibited conditions such as exposed wire, visible excess adhesive, open jump rings, sharp edges or misoriented pearls.
Control packaging, labels and regulatory copy
Treat retail packaging as part of the product. Identify pouch or box SKU, protective materials, insert, logo artwork, barcode data, country-of-origin wording, quantity, inner pack and carton marks. Give every artwork file a revision and readable dimensions. The pack should state which party supplies variable data and who verifies it before printing.
Product descriptions and labels should represent cultured pearls, treatments and metallic content truthfully. The FTC Jewelry Guides provide relevant U.S. guidance, while other destinations may apply different rules. The tech pack should not make a universal legal claim; it should identify the destination, required review, approved wording and supporting documents. Keep compliance evidence traceable to the components and lot actually used.
Release, inspect and revise the pack
Before release, conduct a cross-functional review of product, quality, sourcing, packaging and commercial fields. Confirm that the physical approval sample carries the same SKU and revision and that all linked files exist. The inspection plan should cite the pack and define critical, major and minor defects, sampling method, tools, conditions and records. Production should acknowledge the released revision before materials are committed.
Use numbered change requests and amendments. Record the reason, old and proposed requirement, affected inventory, price and schedule impact, evidence and approvers. Archive obsolete files without leaving them available as current instructions. For reorders, verify that the pack still matches the product listing and retained sample. A disciplined pack reduces guessing, but it works only when it remains the source of truth throughout quote, sample, production, inspection and shipment. Include a revision history that briefly states what changed and why, allowing purchasing, production and inspectors to identify the new requirement without comparing every line manually.
Procurement decision table
| Document | Primary purpose | Minimum control |
|---|---|---|
| Tech pack cover | Identify product and released revision | SKU, revision, owner, date and approval status |
| Technical drawing | Define dimensions and relationships | Views, tolerances, measurement condition and item references |
| Bill of materials | Define every production and packaging input | Codes, materials, finish, quantity, supplier and alternates |
| Approved sample record | Control visual and construction boundaries | Unique label, date, attributes controlled and photographs |
| Inspection plan | Define release evidence | Lot, sampling method, defect classes, tools and records |
Buyer checklist
- [ ] Assign one SKU and revision across all documents and samples.
- [ ] Define cultured pearl material, treatment, quality and drilling.
- [ ] List every component and package in the BOM.
- [ ] Dimension critical product and artwork features.
- [ ] Identify controlled construction and prohibited conditions.
- [ ] Record approved samples and document precedence.
- [ ] Link the current inspection plan and defect definitions.
- [ ] Use written change control for every substitution or revision.
Frequently asked questions
What is the difference between a tech pack and a BOM?
The tech pack is the broader controlled instruction set. The BOM is the component list within or linked to it, identifying every material and quantity required for one product.
Is an approved pearl jewelry sample enough without a tech pack?
No. A sample shows appearance and construction but cannot define every tolerance, hidden material, artwork file, packaging rule, inspection method or change requirement.
Should AAA appear in a pearl jewelry tech pack?
It may remain as a supplier reference, but it should be supported by written size, shape, color, luster, surface, matching, drilling and sample boundaries.
How should a component substitution be handled?
Use a written change request identifying the old and proposed part, affected quantity, evidence, price and schedule impact, then release an approved revision before production.
Related freshwater pearl buying guides
Sources and official references
Use these primary references together with the written product specification and destination-market professional advice.
Turn this guide into a purchase-ready specification
Send Tony Ren your target pearl product, quality tolerances, quantity, packaging and destination. We can discuss current-batch evidence, samples and a clearly scoped quotation.