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Date：2026-08-24How to test for mold? Export companies practicing mold management cannot wait until mold appears. Testing must be done at material intake, during production and before shipment. This article covers the self-testing kit, concrete processes and lab submission standards.
1. The Self-Testing Kit (Three Tools)
| Tool | What It Checks | When | Interpretation |
|---|---|---|---|
| Mold test pen | Surface spore quick test | Intake, finished sampling | Color in 5-10 min |
| Moisture meter | Material moisture | Bamboo/wood, cartons, textiles | Wood ≤12%, textiles ≤8% |
| Observation culture | Spots and species | Confirming suspects | 48-72h culture |
Why are these three enough? Mold needs nutrients, moisture and temperature – the meter checks water, the pen checks whether spores exist, culture checks species and severity. Three tools cover all judgment needs.
2. How to Use the Mold Test Pen
- Wipe the surface to sample (about 5cm²);
- Place the swab in the test solution and shake 30 seconds;
- Add 2-3 drops to the test card, wait 5-10 minutes;
- Compare with the color chart: color change means spores present.
Note: the pen is a qualitative screen – for quantity, species and mold resistance grade, send samples to a third-party lab.
3. Moisture Testing: The First Gate
Safety lines: wood/bamboo ≤12%, textiles 5%-8%, cartons ≤12%. Exceeded moisture means dry first – storing wet material sends mold’s culture conditions straight into the warehouse.
4. When You Need Lab Testing
- Common standards: GB/T 1741, ASTM G21, AATCC 30, JIS Z 2911;
- Culture conditions: 28±2°C, ≥90%RH, 28 days;
- Report content: test strains, conditions, mold resistance grade (0-4, 0 best);
- Fast channel: iHeir’s own microbiology lab offers rapid testing.
Conclusion
How to test for mold? Test moisture at intake, sample spores during production, keep samples for shipment review. For testing tools or lab services, contact us or learn about our R&D center.
