Incoming Quality ControlIQC · Incoming
- ✓Incoming linters inspection: grade & maturity check
- ✓Impurity and foreign-matter screening
- ✓Moisture testing before cooking
- ✓Graded release to production batches
Quality System
Every batch tested, every batch traceable
Our quality system follows ISO 9001 principles across incoming, in-process and outgoing control. The in-house laboratory tests each batch before release, retained samples are stored for re-checking, and every shipment carries a batch Certificate of Analysis.
- ✓IQC / IPQC / OQC checkpoints through the entire process
- ✓Batch number = production date + line + grade — fully traceable
- ✓Retained sample kept for every batch (retention period pending)
ISO 9001 (cert. no. —)COA with every batchRetained samples
Three-Stage Control
IQC → IPQC → OQC
The same three checkpoints procurement teams audit — each with concrete, process-level test items.
In-Process Quality ControlIPQC · In-Process
- ✓Cooking alkali concentration & temperature logging
- ✓Bleaching-stage whiteness tracking
- ✓In-process viscosity (DP) sampling
- ✓Key parameters recorded every shift
Outgoing Quality ControlOQC · Outgoing
- ✓Finished-batch testing: α-cellulose, viscosity, ash
- ✓Iron, whiteness & moisture verification
- ✓Finished-batch COA release — no batch ships without it
- ✓Non-conforming batches blocked from release
Test Capability
What we test
The core parameters on every batch COA — values are grade-specific and issued per batch.
| Parameter | Test Method | Typical Value |
|---|---|---|
| α-Cellulose | Per GB/T — | Ask for latest spec |
| Viscosity | Per GB/T — | Ask for latest spec |
| Ash | Per GB/T — | Ask for latest spec |
| Iron | Per GB/T — | Ask for latest spec |
| Whiteness | Per GB/T — | Ask for latest spec |
| Moisture | Per GB/T — | Ask for latest spec |
Lab equipment: viscometer · analytical balance · muffle furnace · spectrophotometer · whiteness meter (per actual lab list)
Standard reference numbers and full method details are listed on each batch COA; grade-specific ranges appear on product spec sheets. Values marked "Ask for latest spec" are confirmed batch by batch — send us your target grade and the latest spec sheet comes back with your quote. No unverified values are published.
Sample COA — Available on request
Traceability
Batch traceability & retained samples
The number-one fear when switching suppliers is “good first batch, drifting second batch”. We answer it with batch numbering, retained samples and third-party inspection support.
- ✓Batch number rule: production date + production line + grade
- ✓Retained sample stored for every batch (retention period —)
- ✓COA shipped with goods and available in advance by email
- ✓Third-party pre-shipment inspection (SGS / CIQ) supported as arranged
Standards & Compliance
Standards we follow
Different markets reference different standards — we align testing and documentation with the ones your audit asks for.
GB/T — (China national standards)GOST — (CIS / Russian markets)ASTM — (US market references)ISO 9001 quality management system
Standard reference numbers are published only after verification against the current standard texts; market-specific certification requirements are handled per customer specification and actual test results.
Test us before you trust us.
Samples ship together with the matching batch COA — compare every parameter against your spec before you place an order.
● Sample & document requests answered within 24 work hours (GMT+8)