How a Shoe Factory Reduced Mold Claims by 90% — Real Case

Short answer: An anonymous export shoe factory cut client-reported mold claims by about 90% after locking four stages: plant climate check, on-line moisture sampling, vapor-phase chip/bag placement, and pre-shipment re-check — instead of only adding more silica gel.

The problem

Claims arrived months after shipment. The factory had already increased silica gel count, but complaints continued on rainy-season lots.

Root cause

1. Environment ignored — Warehouse and dispatch-point humidity not recorded.
2. Materials re-wet — Packing materials absorbed moisture after cutting.
3. No vapor-phase standard — Operators treated anti-mold as optional.

The solution

1. Stage 1: Plant environmental analysis on the Bester after-sales form.
2. Stage 2: Nine-part moisture check (vamp, midsole, lining, cartons, papers, lace) graded Normal / Controllable / High / Risk.
3. Stage 3: Lock A505 (peak season) or C304 placement SOP; re-check before loading.

Result

After one full season under the locked process, the factory reported roughly 90% fewer mold-related claims versus the prior year (client-reported). Exact claim counts stay confidential.

Limitations

90% is client-reported, not a lab guarantee. New factories, new materials, or skipped SOPs can reverse gains. Chips do not fix already moldy stock.

Relevant test data

According to test report No. 2025FM00761R01D from Guangdong Provincial Microbiological Analysis and Testing Center (method DA/T 26-2000, issued 2025-02-26) — Mold Growth Rating: Grade 0, 28-day test, 8 mold species, tested on paper/cloth/leather — all three materials showed zero visible mold growth, A505 anti-mold chips inhibit spore germination throughout the test period.

FAQ

Sources and further reading

• Full-process service
• Testing & Compliance Center
• Buyer FAQ