This guide lists what to inspect at each checkpoint for pins, keychains, medals and trophy replicas, and what a photo cannot show.

Key Takeaways

  • Quality control has three checkpoints: raw material inspection, a sample check before mass production, and inspection of the finished goods.
  • Checking on site at the factory finds problems that photos and videos do not show, such as plating wear, enamel level and fit.
  • At the partner factories behind this guide, die-struck pins are held to about 0.15 mm on the outline and 0.1 mm on recessed detail lines, with an enamel-fill depth of roughly 0.4 to 0.6 mm.
  • Plating is specified in microns, for example a 4 to 6 micron nickel undercoat and a 0.5 to 2 micron top plate, so a quote and a sample can be compared with numbers.
  • Approve the sample against a written specification, and keep it, because it is the reference for the whole run.

In This Article

Where Do the Figures in This Guide Come From?

Figures marked as specifications come from the standards Am Ball’s partner factories work to. Everything else is general practice, so ask any producer for its own figures in writing.

What Are the Quality Control Checkpoints?

A reliable quality control process catches problems in three places:

  1. Raw materials. The base metal and enamel inputs are inspected before production starts.
  2. The sample. A physical sample is checked and approved before mass production begins.
  3. The production run. Finished goods are inspected against the approved sample before packing and shipping.

Am Ball runs the first two checks on site at its partner factories. The third is standard good practice, so ask any producer how it is done. Our guide to choosing a merchandise manufacturing partner explains how to vet a factory’s quality system.

What Should Quality Control Check on the Sample?

Compare the sample against the approved artwork and a written specification:

  • Does the outline match the artwork within the tolerance, about 0.15 mm on die-struck pins?
  • Are the recessed lines crisp and even, within about 0.1 mm?
  • Is the enamel level even, with no bubbles, gaps or spill over the metal lines? The die cuts the fill areas to roughly 0.4 to 0.6 mm.
  • Do the colors match the reference numbers you specified, in daylight and under office lighting?
  • Is the plating even, without pitting, dull patches or edges where the base metal shows? Ask for the thickness. At the partner factories behind this guide, the nickel undercoat is 4 to 6 microns and the top plate 0.5 to 2 microns. Nickel release for skin-contact items is regulated separately, as our guide to GPSR and nickel rules for metal pins and keychains explains.
  • Is the post, clutch, ring or clasp secure, and is the back finished cleanly?
  • For trophy replicas and medals, do the weight and the base match what you approved?

A Sample That Looks Right in a Photo

Say the photo of a sample pin looks perfect: crisp lines, even color. In the hand, the edge of the plating shows the base metal where a thumb has rubbed it, and the color reads a shade darker in daylight than on screen. Neither problem is visible in a photo.

This is why a physical sample matters. Handle it, rub the edges, check it by a window, and pull on the attachment. If something fails, write it down against the specification and ask for a corrected sample before production starts.

How Do You Document an Approval?

An approved sample is only useful if everyone can tell later what was approved. Keep a short record:

  • the written specification, with tolerances, color reference numbers and plating thickness
  • the signed and dated sample, stored sealed, with photos of the front and back
  • the list of any changes requested and the date each was confirmed
  • the name of the person who signed off

If the product carries a rights holder’s marks, the rights holder approves the sample as well, as described in how sports merchandise licensing works.

What Should Be Checked on the Production Run?

  • Sampling plan. How many pieces are inspected per carton or batch, and against which criteria? Acceptance sampling by attributes is standardised in ISO 2859-1, which ties the number of pieces inspected to an acceptance quality limit. Ask which plan and limit the factory applies.
  • Consistency. Does a piece from the middle of the run match the approved sample?
  • Counts and packing. Are quantities and packaging correct, and is each carton labelled?
  • Documents. Do you have the inspection record and the compliance paperwork the buyer needs? For packaging, see our guide to PPWR for merchandise, which follows the European Commission’s PPWR FAQ.

What Typically Goes Wrong?

These are common failure modes in plated, enamel-filled metal goods. Treat the causes as typical rather than certain, and ask the factory what it sees:

  • Pits or dull patches in the plating, often a sign of poor surface preparation before plating.
  • Enamel that spills over the metal lines or sits uneven, which points to filling or polishing problems.
  • Colors that drift from the reference, which can come from a different pigment batch.
  • Loose posts, rings or clasps, which usually means a weak join between the attachment and the body.
  • Warped backs or edges, which can appear after striking or polishing.

Each of these shows up at the sample if you look for it, and each is far cheaper to fix there than on a finished run.

Who Is Responsible When Something Fails?

Agree this before production. A written specification, an approved sample and a named person who signs off turn a dispute into a comparison, and a quality control record that everyone can read settles most arguments before they start.

Frequently Asked Questions

When should quality control happen?

At three points: raw materials before production, the sample before mass production, and the finished goods before shipping.

Is a photo of the sample enough to approve it?

Photos help, but they cannot show plating wear, feel, attachment strength or color under different light. A physical sample is the reliable check.

What tolerances apply to metal pins?

At the partner factories behind this guide, die-struck pins are held to about 0.15 mm on the outline and 0.1 mm on recessed detail lines. Ask any producer for its figures in writing.

How is plating thickness specified?

In microns. A typical specification names the nickel undercoat and the top plate separately, for example 4 to 6 microns and 0.5 to 2 microns.

What if the sample is wrong?

Reject it with a written list of differences from the specification, and ask for a new sample before production starts. Production on a flawed approval is the costly mistake.

Conclusion

Quality control in metal merchandise is decided at the sample. Approve against numbers, handle the physical piece, and keep the approved sample as the reference for the whole run.

Reach out to discuss sample checks and production.