Golden sample (reference sample): the guide

The golden sample, or reference sample, is the piece the buyer approves before production: it sets the expected appearance, materials and finishes. Signed, dated and kept in several copies, it is the inspector’s benchmark during and after production.

Suppliers and purchasing · By Guerric Laspougeas · Published 6 October 2026

What the reference sample is for

A specification says “glossy finish”, “red”, “even stitching”. Everyone can interpret it. The reference sample, also called the golden sample or master sample, settles it: it is the physical piece every unit produced must look like. It is used at three moments:

• when production starts, to set up machines and train operators;
• during inspections: at the initial production check and then the final random inspection, the inspector compares the pieces with the approved sample;
• in a dispute, to decide whether a deviation is a defect or not.

Approving the sample, step by step

1. Ask for a sample made under production conditions: same materials, same component suppliers, same tooling. A prototype made by hand in the workshop is not a reference.
2. Check it completely: dimensions, function, colour under standard lighting if the shade matters, markings, instructions, packaging. Have the regulatory tests done in a laboratory on this sample if they are needed.
3. Record the deviations you accept: if you approve despite a small defect, write it down; otherwise it will become the standard for the whole production.
4. Sign and seal: a label with the product reference, version number, date, signatures of buyer and supplier; a seal or closed bag to prevent any substitution.
5. Photograph every side and every critical detail, and attach the photos to the purchase order.

Keeping the reference up to date

• Keep one copy per product version: a new colour, a new component or a new mould calls for a new approved sample.
• Store it away from light and humidity, which change colours and materials over time.
• Renew it if the order repeats over several years: compare old and new before destroying the old one.
• Keep it with the lot’s inspection and test reports: it is evidence of your control process, see our guide quality control and traceability.

Costly mistakes

• Approving from a photo: a photo shows neither feel, nor weight, nor the true colour.
• Leaving the only copy at the factory: you will not be able to prove anything.
• Accepting an “improved” sample: made carefully by the best operator, it gives a picture of production that mass production will not match.
• Forgetting the packaging: cartons, labels and instructions are part of the reference.

With a new supplier, the sample says nothing about the factory’s ability to reproduce the same quality over thousands of pieces: an initial factory evaluation answers that question. To see how the checks fit together, read our guide to quality control in China.