Quality Control

Custom Promo Order QC Plan: RFQ to Bulk Shipment

1. Lock Inspection Criteria Into the RFQ

Most promo product defects are created before tooling starts. If the RFQ only includes artwork and target quantity, the supplier will quote against its default material, plating, packing and inspection level. When the buyer later adds tighter tolerances, retail packing or AQL inspection, the factory must either raise the price, remake the sample or accept a margin loss that often reappears as quality risk.

For custom enamel pins, challenge coins, keychains, magnets, embroidered patches and lanyards, the RFQ should read like a controlled build sheet. Include the size in millimeters, material, thickness, color count, finish, attachment, packing, carton limits, compliance requirements and final inspection plan. The goal is not to over-engineer a promotional item; it is to prevent two factories from quoting two different products under the same artwork.

• State dimensional tolerances: ±0.30 mm for pins under 40 mm, ±0.50 mm for coins or keychains from 40–70 mm, and thickness tolerance of ±0.15 mm unless the design needs tighter fit.
• Specify base material: iron or brass for stamped pins, zinc alloy for cast keychains, brass or zinc alloy for challenge coins, PVC or polyester twill for patches, and polyester webbing for lanyards.
• Define finish targets: standard decorative electroplating at 0.03–0.05 microns, heavier promotional wear at 0.08–0.12 microns, epoxy dome thickness around 0.5–0.8 mm where used.
• Set color standards: Pantone coated/uncoated reference, Delta E ≤3 for controlled print where instruments are available, and visual approval under D65 light at 30 cm.
• Name the inspection plan: ISO 2859-1 or ANSI/ASQ Z1.4, general inspection level II, AQL 2.5 for major defects, AQL 4.0 for minor defects, and zero tolerance for critical defects.
• List packing and logistics limits: unit bag or card, inner box count, master carton count, carton gross weight target under 15 kg for dense metal items, and required carton marks.

2. Compare Quotes on the Same Build Standard

A low quote is only useful when the specification is identical. A 35 mm soft enamel pin can be quoted as 1.0 mm iron with one clutch, 1.2 mm iron with epoxy, or 1.5 mm brass with two posts and a custom backing card. All three may look similar in a photo, but they do not have the same weight, durability, tooling cost or perceived value.

Use a comparison table that separates unit price, mold charge, sample fee, packing cost and bulk lead time. Common China FOB ranges for B2B promotional orders are predictable when the build is clear: 30–35 mm soft enamel pins at 500 pieces often run USD 0.45–0.95 FOB; 50 mm zinc alloy keychains USD 0.80–1.80; 45 mm two-sided challenge coins USD 2.20–4.80; 75 mm embroidered patches USD 0.35–0.95; and 20 mm polyester lanyards USD 0.35–0.85 depending on print, hardware and safety breakaway.

MOQ also affects the quote. For pins, coins and keychains, practical MOQ is often 100 pieces for sampling or small runs, with better pricing at 300, 500, 1,000 and 5,000 pieces. Patches can usually start at 100–300 pieces; lanyards are commonly more efficient from 500 pieces because webbing setup and printing waste are less favorable at very small runs.

Item	Comparable RFQ specification	Typical MOQ tiers	Common hidden cost
30–35 mm enamel pin	1.2–1.5 mm iron or brass, 4 soft enamel colors, 1 butterfly clutch, OPP bag	100 / 300 / 500 / 1,000 pcs	Mold fee USD 45–90 excluded; metal reduced to 1.0 mm
50 mm zinc alloy keychain	2.0–3.0 mm casting, 25 mm split ring, 0.05 micron plating, OPP bag	100 / 300 / 500 / 1,000 pcs	20 mm ring, weak jump ring under 1.2 mm wire, or one-sided design only
45 mm challenge coin	3.0 mm brass or zinc alloy, two-sided relief, recessed enamel, standard edge, capsule or OPP bag	50 / 100 / 300 / 500 pcs	Edge text, antique finish or capsule packing priced separately
75 mm embroidered patch	Twill base, 75% embroidery coverage, merrowed or heat-cut edge, iron-on backing	100 / 300 / 500 / 1,000 pcs	Quote assumes 50% coverage or no backing adhesive
20 mm lanyard	900 mm finished loop, polyester, sublimation or screen print, metal hook, safety breakaway	500 / 1,000 / 3,000 / 5,000 pcs	Breakaway, buckle, individual bag or carding excluded

3. Approve Digital Proofs With Process Limits Marked

Digital proof approval should confirm manufacturability, not just layout. Fine text, thin raised borders, isolated metal islands, tight cutouts and QR codes often look clean on a screen but fail after stamping, casting, polishing, plating or enamel filling. A good proof marks the production limits before the buyer pays for tooling.

For stamped iron or brass pins, keep raised metal lines at 0.25 mm or wider where possible. For zinc alloy casting, use 0.35 mm or wider because molten metal does not reproduce fine edges as sharply as stamping. Enamel recesses below 0.30 mm can trap bubbles or fill unevenly. Fragile cutout bridges should be at least 0.8 mm wide, and larger badges over 45 mm should show pin post placement so the item hangs straight on fabric.

Printed codes require separate control. A QR code on metal, acrylic or PVC should usually be at least 15 x 15 mm for casual phone scanning, with a full quiet zone, high contrast and no glossy glare over the code. If the code is smaller than 12 mm, confirm it with a printed sample before mass production rather than approving from a vector file.

The final proof should include overall size, thickness, plating color, enamel type, Pantone references, attachment position, backstamp, edge style, magnet size or grade if applicable, packing method and carton plan. Every item in the proof should match the quotation, sample request and purchase order.

4. Sample the Highest-Risk Features

A physical sample is not only an artwork approval. It is the first functional test of the process. The buyer should check the logo, but also the features most likely to fail in use: plating adhesion, enamel level, edge burrs, attachment strength, magnet pull, lanyard print rub, patch fray and packing fit.

Typical lead times are short but not instant. Digital proofing usually takes 1–3 working days after artwork is complete. Physical samples often take 7–12 days for enamel pins and zinc alloy keychains after mold approval, 10–15 days for challenge coins, 5–10 days for embroidered patches and 7–12 days for lanyards. Express courier transit to overseas buyers adds 3–5 days. Rush sampling can save time, but it may reduce curing, polishing or internal recheck time, so use it only when the risk is low or the event deadline is fixed.

• Request 2–3 physical samples for metal items so front, back, attachment, plating and packing variation can be checked, not only the best single piece.
• Check dimensions with calipers against the approved tolerance, including thickness at the thickest and thinnest points.
• For plated goods, run a tape adhesion check on a non-critical area and inspect bends, recesses and edges for peeling, burning or dark spots.
• For keychains, pull-test the ring and connector at 8–12 kg for normal promotional use; specify higher loads only when the item is sold as a heavy-duty accessory.
• For magnets, test holding force on a clean vertical steel plate; a 20 x 2 mm ferrite magnet and a 15 x 3 mm neodymium magnet behave very differently despite similar appearance.
• For lanyards, rub printed areas 20 dry cycles with a white cotton cloth and reject visible ink transfer unless the buyer has approved that risk.
• For patches, bend the edge and inspect fray, adhesive coverage and heat-seal consistency before approving bulk backing.

5. Freeze the Golden Sample and Defect List

Bulk production should not start from a chat message such as “make the blue brighter” or “same as last time.” It should start from a frozen approval package. That package includes the final artwork file, signed digital proof, approved physical sample or sample photos, material and finish specification, packing instructions, defect definitions, AQL level and any compliance notes.

Label the golden sample with order number, item code, date, plating finish, enamel or print method, attachment and packing method. Keep one reference with the factory and one with the buyer or sourcing office when possible. This matters for reorders because plating baths, enamel batches, embroidery thread lots and mold wear can change over time.

A practical defect list separates critical, major and minor defects. Critical defects require zero tolerance: sharp exposed points, detached magnets or small parts that create a child safety risk, wrong brand, mixed customer artwork, unreadable mandatory warning or contaminated product. Major defects include wrong Pantone family, plating peel, broken clutch or ring, severe enamel void, missing logo detail, wrong packing count or QR code that will not scan. Minor defects include tiny polishing marks, small dust under epoxy or slight shade variation within the approved range and not visible at normal viewing distance.

6. Inspect During Production, Not Only at the End

Final inspection is necessary, but it is late. Once all pieces are assembled, carded and packed, defects become slower and more expensive to sort. In-process QC is especially valuable for orders above 1,000 pieces, event deadlines, child-facing products, retail programs and mixed-product kits.

For metal items, useful checkpoints are die or mold trial, raw stamping or casting, polishing before plating, plating before enamel, enamel before epoxy, assembly and packing. For patches, check thread color, stitch density, backing film and edge finish before all pieces are heat-pressed or bagged. For lanyards, check webbing width, print registration, cut length and hardware before final bundling.

Sampling during production does not need to stop the line. On a 1,000-piece pin order, checking 20–30 pieces after stamping can catch shallow recesses or broken lines. Checking another 20–30 pieces after plating can catch black spots or masking failure before enamel filling. On 5,000 pieces or more, staged checks every major process step prevent days of repeated defects.

Stage	Inspection focus	Typical acceptance target
Tooling trial	Shape, logo clarity, raised lines, cutout strength	No missing raised lines; bridges preferably ≥0.8 mm
Polishing	Flatness, burrs, edge rounding, detail loss	No sharp burrs; logo detail clear at 30 cm
Plating	Color, coverage, stains, adhesion, recess quality	No peeling; standard decorative target 0.03–0.05 microns
Enamel or print	Pantone match, overflow, bubbles, dust, QR readability	No major overflow; QR scans within 2 seconds on normal phone camera
Assembly	Clutch, ring, magnet, brooch pin, hook, breakaway	Placement within ±1.0 mm; agreed pull check passed
Packing	Bag, backing card, barcode, carton count, carton weight	Unit count exact; export carton preferably under 15 kg gross

7. Use Final Inspection to Release Shipment and Reorder Data

Final inspection should answer a commercial question: can this shipment be released without returns, event shortages or brand complaints? It is not the time to redesign the product. The release standard should be agreed before production, especially when a third-party inspector, buyer office or distributor will inspect the shipment.

For most promotional orders, ISO 2859-1 general inspection level II with AQL 2.5 major and AQL 4.0 minor is practical. For a 1,000-piece lot, the normal level II sample size is typically 80 pieces. At AQL 2.5, the accept/reject numbers are commonly Ac 5/Re 6 for major defects; at AQL 4.0, Ac 7/Re 8 for minor defects. Critical defects remain zero tolerance. Retail, child-facing or high-value orders may use tighter AQL, but the buyer should allow extra inspection time and 2–3% production buffer for sorting or replacement.

Packing must be inspected with the product. Dense metal items can damage inner boxes if cartons are overloaded, so keep gross weight under 15 kg where possible. Common carton formats include about 35 x 25 x 25 cm for small metal items and 45 x 35 x 30 cm for mixed promotional sets, but the final size should follow unit packing, product weight and courier requirements. Example packing plans include 1 enamel pin per OPP bag, 100 pieces per inner box and 1,000 per carton; coins in capsules with foam layers; and lanyards bundled 50 pieces per inner bag and 500 per carton.

Before shipment release, collect final product photos, carton marks, gross and net weights, carton dimensions, packing list, commercial invoice draft, HS code suggestion, mold number, Pantone list, plating standard, attachment specification and approved sample photos. This reorder file is as important as the first inspection report. It allows the next production run to repeat the same build instead of reconstructing the specification from emails and memory.

• Send one RFQ document covering size, material, thickness, finish, colors, attachment, packing, MOQ tier, lead time and AQL.
• Compare suppliers only after mold fee, sample fee, sample lead time, bulk lead time, FOB port and packing method are visible.
• Approve physical samples after checking artwork, dimensions, function, attachment strength, finish and packing, not only surface appearance.
• Freeze the golden sample package before bulk production and reject undocumented changes made through chat messages.
• Use in-process QC for quantities above 1,000 pieces, tight deadlines, retail programs, child-facing items and complex kits.
• Release shipment only after final inspection, carton data, export documents and reorder records are complete.

Have a project? Send your artwork and target quantity and we’ll reply with a detailed quotation within 12 working hours.