SUNSTAR PAPER CULT LLP
Sustainable Paper. Superior Performance.
Reliable Supply.
Sunstar Paper Cult LLP
Sunstar Paper Cult LLP is a paper manufacturing company focused on producing quality paperboard solutions with a strong emphasis on recycled materials, product performance and reliable supply.
In 2025, Sunstar Paper Cult LLP commenced production of Kappa Rigid Board, manufactured using recycled materials with a focus on quality, sustainability and reliable supply.
Explore Products →Kappa Rigid Board
High strength. Excellent printability. Versatile applications.
Kappa Rigid Board is a durable paperboard made from recycled fibres, designed for strength, stability and presentation across a wide range of packaging and industrial applications.
Technical Specifications →Product Specifications
Grey / Grey Rigid Board — official supplied specification data.
| Thickness | 1.0–3.0 mm |
| GSM | 660–1,980 g/m² |
| Caliper tolerance | ±3% |
| GSM tolerance | ±5% |
| Stiffness tolerance | ±15% |
| Moisture tolerance | ±2% |
| Flatness | 0.2–1.5% |
| Sheet sizes | 31 × 41 in / 25 × 36 in |
Source: Sunstar Paper Cult LLP supplied specification sheets. See the Documents section for the original PDFs.
Kappa Rigid Board Range
Grey / Grey, Black / Grey and White / Grey presentation boards. Official product photographs can replace these visuals when supplied.
Grey / Grey
Recycled-material rigid board construction.
Black / Grey
Dark outer surface with grey board construction.
White / Grey
White outer surface with grey board construction.
Thickness & GSM Range
| Thickness (mm) | Grey / Grey GSM | White / Grey GSM | Stiffness MD (mN·m) | Stiffness CD (mN·m) |
| 1.0 | 660 | 680 | 710 | 362 |
| 1.2 | 792 | 816 | 1105 | 505 |
| 1.5 | 990 | 1020 | 1490 | 710 |
| 1.8 | 1188 | 1224 | 2035 | 1038 |
| 2.0 | 1320 | 1360 | 2290 | 1235 |
| 2.5 | 1650 | 1700 | 2750 | 2155 |
| 2.8 | 1848 | 1904 | 5285 | 3230 |
| 3.0 | 1980 | 2040 | 5565 | 3870 |
Selected thicknesses shown for website presentation. The full supplied specification sheet contains the complete range from 1.0 to 3.0 mm.
Endless Possibilities
Kappa Rigid Board can serve multiple industries where strength, versatility and a responsible material profile are important.
Creating a Greener Future
We are committed to a more resource-conscious paperboard approach by using recycled materials, supporting circularity and focusing on responsible manufacturing.
Specifications & Certifications
Official technical documents supplied for Sunstar Kappa Rigid Board are available below.
Thickness, GSM, sheet sizes, sheet weights and tolerances.
View PDFThickness, Grey/Grey and White/Grey GSM and stiffness data.
View PDFFHHL report for Sunstar Multilayer Hard Board (Kappa Board), including US-FDA 176.170:2021 and IS 6615:2021 testing.
View ReportSGS test report for paper board grey / white-grey sample.
View ReportSunstar Paper Cult LLP is FSC™ Chain-of-Custody certified. Certificate No. SGSHK-COC-400447; valid from 30 March 2026 to 29 March 2031, subject to satisfactory surveillance audits.
View CertificateDocuments are provided as supplied. The website does not alter the original reports.
Enquiry Form
Tell us about your application, size, thickness and quantity requirement.
FSC™ CERTIFIED
Sunstar Paper Cult LLP is FSC™ Chain-of-Custody certified.
Certificate No. SGSHK-COC-400447 · Valid 30 March 2026 – 29 March 2031