Every AiEInkSmart label is tested before it ships, and every batch is inspected by our team and the partner factory together. This page lists the checks a label goes through, from incoming materials to the outgoing inspection, and what the reliability laboratory tests.
Inspection stages
| Stage | What is checked | Who |
|---|
| Incoming quality control (IQC) | Components, displays, batteries and housings sampled against specifications | Factory |
| Display module checks | Module deliveries sampled; modules powered on the finished label, tested at low temperature and aged (details) | Our team and the factory |
| Solder-paste inspection (SPI) | Volume, height and position of every paste deposit | Factory, automated |
| First-article inspection | First board of each run checked against the bill of materials | Factory, approved with our team |
| AOI and X-ray | Missing, shifted or reversed parts; solder joints, including hidden joints | Factory, automated |
| Board functional test | Power, radio and display interface | Factory |
| Finished-label test | Every label powered, paired over the air and shown a test image | Factory |
| Ageing | Sampled labels run through ageing before packing | Factory |
| Outgoing quality control (OQC) | Batch sampled for appearance, display, radio and packaging | Our team and the factory |
Testing every label
At the end of the line every label is powered, connected to a base station over the air and shown a test image, so the display, the radio and the battery contact are all checked on the finished product. At our Shenzhen partner this runs on an automated RF test line and automated module-testing machines; in Guangzhou and Foshan it runs on functional-test stations at the end of the assembly line.
Automated module testing, board functional test and AOI inspection.
Reliability laboratory
Our Foshan partner runs a reliability laboratory that we use when a new design or material needs to be qualified. Its equipment includes:
- Programmable temperature and humidity chambers
- High-temperature ageing rooms
- UV ageing and salt-spray chambers
- Rain test chamber
- Drop tester and transport-vibration table for packaging
- Glow-wire and flammability testers
- Integrating sphere for optical measurement
Reliability laboratory at our Foshan partner.
Label specifications such as the 0–40 °C operating range of standard labels, the −25 to +30 °C range of freezer labels and the IP67 rating of the waterproof label are listed on each product page.
Traceability
Every label carries a unique ID and barcode. In Guangzhou each board can be traced by serial number to its solder-paste inspection data, placement offsets and reflow profile; across all sites, labels are traceable to their production batch. If a problem is reported in the field, we can identify the batch and check its inspection records with the factory.
When something goes wrong
Quality issues are handled by our team, not passed between companies. We collect the label IDs and symptoms, review the batch records with the factory, agree the cause and the corrective action, and replace faulty labels under warranty.
FAQ
Is every label tested, or only a sample?
Every finished label is powered, paired over the air and shown a test image before packing. Ageing and outgoing inspection are done on samples from each batch.
Who does the final inspection?
Outgoing inspection is done jointly by our team and the partner factory against acceptance criteria we set.
Can you test labels for freezer or wet areas?
Yes. New designs and materials can be qualified in the reliability laboratory, including temperature and humidity cycling, ageing and water testing.
Can we see the inspection records for our order?
Yes. Ask us for the inspection summary of your batch; we can also arrange a factory visit or a video walk-through of the test stations.
Have specific quality requirements? Send us your acceptance criteria or test standard and we will confirm how your order will be inspected. See also
partner factories and
SMT and assembly.
