Certified Quality Assurance
GOST 595-79 verified certificates with every batch, covering alpha-cellulose, viscosity, moisture, ash, and brightness.
European Supply Partner · Cotton Cellulose · Industrial Raw Materials
Precision Cellulose
for Critical
Applications
CASTELWOOD OVERSEAS delivers premium cotton cellulose and industrial raw materials to paper, filtration, hygiene, and manufacturing sectors worldwide — with transparent sourcing, certified quality, and dependable logistics.
- Grades
- 8
full system
- Viscosity Range
- 15–650
mPa·s
- α-Cellulose
- ≥92%
across all grades
- Certification
- 100%
batch certified · GOST 595-79
01 — About
European Partner for Cotton Cellulose & Industrial Raw Materials
CASTELWOOD OVERSEAS specializes in connecting global manufacturers with reliable industrial supply chains. We bridge the gap between raw material sources and industrial end-users through comprehensive services spanning international sourcing, quality verification, transparent documentation, and European logistics.
Every shipment includes full traceability and a quality certificate confirming compliance with GOST 595-79 — the intergovernmental standard for cotton cellulose quality.
- International Sourcing
- Quality Verification
- Transparent Documentation
- European Logistics
GOST 595-79 Compliant
Flagship Application
The Cellulose Behind Banknote Paper
Cotton cellulose is the essential substrate for currency paper worldwide. CASTELWOOD OVERSEAS grades 35, 70, and 100 meet the exacting specifications demanded by central banks and security paper manufacturers.
See Compatible Grades →
Natural Origin
From Field to Factory
Every batch of CASTELWOOD OVERSEAS cotton cellulose begins as raw cotton linters — the short fibers remaining on the seed after ginning. Through controlled purification, bleaching, and drying, these natural fibers are transformed into a precisely specified industrial material used in the world's most demanding applications.
02 — Products
Cotton Cellulose Grade Architecture
A defined spectrum from ultra-low viscosity chemical grades to high-viscosity industrial grades, each fully documented and batch-certified to GOST 595-79.
| Grade | Viscosity | α-Cellulose | Expand |
|---|---|---|---|
| 15 | ≤15 mPa·s | ≥98.5% | |
| 25 | 16–25 mPa·s | ≥98.0% | |
| 35 | 26–35 mPa·s | ≥97.5% | |
| 70 | 36–70 mPa·s | ≥96.5% | |
| 100 | 71–100 mPa·s | ≥96.0% | |
| 150 | 101–150 mPa·s | ≥95.5% | |
| 350 | 151–350 mPa·s | ≥94.0% | |
| 650 | 351–650 mPa·s | ≥92.0% |
All grades certified to GOST 595-79 · Individual batch analysis with every shipment
03 — Quality Assurance
Every Batch Certified. Every Parameter Verified.
Every shipment is accompanied by a quality certificate confirming full compliance with GOST 595-79. Our verification covers individual batch analysis with complete source-to-delivery traceability.
GOST 595-79 — 100% Batch Certified
Verification Covers
- GOST 595-79 compliance verification
- Individual batch analysis
- Alpha-cellulose content measurement
- Viscosity testing
- Moisture content analysis
- Ash content determination
- Brightness measurement
- Full source-to-delivery traceability
Certificates by Grade
α-Cellulose≥98.5%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥98.0%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥97.5%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥96.5%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥96.0%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥95.5%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥94.0%
Moisture≤6%
Ash≤0.10%
α-Cellulose≥92.0%
Moisture≤6%
Ash≤0.10%
04 — Applications
Application–Grade Matching System
Each industrial application has specific cellulose requirements. Select an application to view recommended grades and key material requirements.
Banknote Paper
Compatible Grades
15253570100150350650
Key Material Requirements
- Alpha-cellulose ≥96%
- Exceptional fiber uniformity
- Controlled moisture content
- Ultra-low ash and foreign inclusions
- High brightness and whiteness
- Consistent batch-to-batch quality
Full Compatibility Matrix
Checkmarks indicate recommended grades for each application.
| Application | 15 | 25 | 35 | 70 | 100 | 150 | 350 | 650 |
|---|---|---|---|---|---|---|---|---|
| Banknote Paper | · | · | · | · | · | |||
| Security & Document Paper | · | · | · | · | · | · | ||
| High-Grade Technical Paper | · | · | · | · | · | · | ||
| Nitrocellulose Production | · | · | · | · | · | · | ||
| Acetate Fiber Manufacturing | · | · | · | · | · | · | ||
| Copper-Based Fibers | · | · | · | · | · | · | ||
| Pharmaceuticals & Cosmetics | · | · | · | · | · | |||
| Food Processing | · | · | · | · | · | · | ||
| Chemical & Industrial | · | · | · | · | · | · |
05 — Why CASTELWOOD OVERSEAS
A Partner, Not Just a Supplier
Consistent Supply Discipline
Reliable supply chain from raw cotton through global logistics, ensuring continuity for industrial operations.
Technical Clarity
Eight defined grades with transparent specifications — no ambiguity, no surprises at delivery.
Responsive Partnership
Direct access to technical and commercial teams for fast, precise answers to sourcing questions.
Industrial-Grade Documentation
Full traceability and compliance records from source to delivery, ready for regulatory review.
Global Logistics Capability
Serving industrial partners across continents with reliable European-routed logistics and documentation.
06 — CASTELWOOD OVERSEAS World
From Raw Fiber to Global Currency
07 — FAQ
Common Questions
Cotton cellulose is a highly purified form of cellulose derived from cotton linters. It is used in paper manufacturing (banknote and security paper), nitrocellulose production, acetate fiber manufacturing, pharmaceuticals, cosmetics, and food processing.
CASTELWOOD OVERSEAS offers 8 grades spanning 15–650 mPa·s viscosity: Grade 15, 25, 35, 70, 100, 150, 350, and 650. All grades maintain α-cellulose ≥92% and are GOST 595-79 certified with individual batch analysis.
Grades 35, 70, and 100 are qualified for banknote paper production, providing alpha-cellulose ≥96%, exceptional fiber uniformity, and consistent batch-to-batch quality required for currency paper.
Every shipment includes a quality certificate confirming GOST 595-79 compliance. Verification covers individual batch analysis for alpha-cellulose, viscosity, moisture, ash content, and brightness, with full traceability.
GOST 595-79 is the intergovernmental standard for cotton cellulose, specifying requirements for purity, viscosity, moisture content, ash content, and brightness. CASTELWOOD OVERSEAS certifies every batch to this standard.
Fill out the contact form on this page, call +48 502 322 700, or email office@castelwoodoverseas.pl. The commercial team is available Monday–Friday, 09:00–18:00 CET (Warsaw time).
Have another question? Contact us
08 — Contact
Speak With Our Commercial Team
Registered Office:
CASTELWOOD OVERSEAS POLSKA SP. Z O.O.
ul. Willowa 24
Dąbrówka, 05-430 Celestynów
KRS: 0001259399 · NIP: 5322127878
REGON: 545449979
Commercial Contact:
CASTELWOOD OVERSEAS POLSKA SP. Z O.O.
Monday–Friday, 09:00–18:00 CET
Our team typically responds within one business day. For urgent enquiries, please call directly.