Incada Silk

Incada Silk

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Folding Box Board

Incada is a folding boxboard product based entirely on fresh fibres. It has a multi-layered fibre composition and construction designed to maximise its stiffness whilst having a low density.

The outer layers consist of bleached chemical sulphate pulp and the middle layers of thermo-mechanically separated fibres (TMP). Pigment coating can be applied to one or both sides and its unique composition is designed so that the product family satisfies different end-use printability requirements.

Product description

Incada Silk is a fully coated white-backed folding box board (FBB) designed for high quality packaging and graphics applications. The product has been developed and is produced to ensure a supremely smooth surface which is double coated with a unique and specially developed coating formulation. The reverse side of Incada Silk is single coated with a matt finish that provides consistent results in both solid print and halftone illustrations. This primary fibre paperboard consistently meets the requirements for high performance in quality printing and varnishing. The ink setting and drying properties ensure good runnability in high-speed offset litho processes. Incada Silk performs well in digital printing presses and is suitable for digital finishing technology.

End use areas

This product is suitable for the following end use areas.

Holmen Iggesund end use box

Packaging

Holmen Iggesund end use graphics

Graphics

Incada
Certifications & Standards

Product related

FSC® Mix

Food safety

Toy safety

 

FSC-C008588

SA-COC-012971

EC 1935/2004

EC 2023/2006

FDA 21 CFR

German BfR XXXVI

Normpack

EN 71 Part 3

EN 71 Part 9
All fibres from sustainable and controlled sources in compliance with the UK Timber Regulation 01/01/2021.
EcoVadis Platinum Medal awarded in 2021 (top 1% of all companies assessed).
 

Mill related

ISO 9001

ISO 14001

ISO 45001

ISO 50001

FSC® 

FSSC 22000

For more detailed information about our certificates, visit iggesund.com/certificates.

Properties - Print side

Tolerances Methods/Remarks
Grammage (g/m²) 220-350 +/-4% ISO 536
Colour L* - PS 95.2 +/-0.8 ISO 5631-2
Colour a* - PS 1.4 +/-0.6 ISO 5631-2
Colour b* - PS -7.2 +/-1.0 ISO 5631-2
Whiteness - PS 120 +/-2.5 ISO 11475
ISO Brightness R457 - PS (%) 91.5 +/-2.0 ISO 2470
Surface roughness PPS - PS (µm) 0.9 ≤1.2 ISO 8791-4
Board gloss 75° - PS (%) 50 -10 ISO 8254-1
Surface strength IGT blister - PS (m/s) 1.0 ≥0.85 ISO 3783
Surface strength IGT pick - PS (m/s) 1.0 ≥0.85 ISO 3783
Cobb - PS (g/m²) 30 - ISO 535

Properties - Reverse side

Tolerances Methods/Remarks
Grammage (g/m²) 220-350 +/-4% ISO 536
Colour L* - RS 96.0 +/-0.8 ISO 5631-2
Colour a* - RS 0.9 +/-0.6 ISO 5631-2
Colour b* - RS -5.2 +/-1.0 ISO 5631-2
Whiteness - RS 114 +/-5.0 ISO 11475
ISO Brightness R457 - RS (%) 90.5 +/-2.0 ISO 2470
Surface roughness PPS - RS (µm) 3.5 ≤5.5 ISO 8791-4
Cobb - RS (g/m²) 30 - ISO 535

Common properties

Tolerances Tolerances Tolerances Tolerances Methods/Remarks
Grammage (g/m²) 220-350 +/-4% 220 +/-4% 240-280 +/-4% 300-350 +/-4% ISO 536
Moisture content (%) - - 6.5 +/-1.0 8.0 +/-1.0 8.5 +/-1.0 ISO 287
Ply bond (J/m²) - - 130 ≥90 150 ≥100 150 ≥100 Tappi 569
Robinson taint <0.6 - - - - - - - EN 1230-2

Robinson taint value is below the detection limit of 0.6.

Grammage dependent properties

Tolerances Methods/Remarks
Grammage (g/m²) 220 240 260 280 300 325 350 +/-4% ISO 536
Thickness (µm) 330 365 405 445 485 540 590 +/-4% ISO 534
Caliper (pt) 13.0 14.4 15.9 17.6 19.1 21.3 23.2 - -
Bending stiffness L&W 5° - MD (mNm) 18.3 25.2 33.0 42.0 52.2 65.8 80.5 - ISO 5628
Bending stiffness L&W 5° - CD (mNm) 7.9 10.5 14.2 18.3 23.0 29.1 35.6 - ISO 5628
Bending resistance L&W 15° - MD (mN) 218 271 351 442 544 683 831 -15% ISO 2493-1
Bending resistance L&W 15° - CD (mN) 91 122 159 201 248 311 377 -15% ISO 2493-1
Bending moment Taber 15° - MD (mNm) 10.5 13.1 16.9 21.3 26.3 33 40.2 - -
Bending moment Taber 15° - CD (mNm) 4.4 5.9 7.7 9.7 12.0 15.0 18.2 - -

Last updated 05 May 2021

Bending Moment Taber is a calculated value based on a correlation factor of 20.7.

Test method

All properties are measured in test climate 23°C/50% RH at Workington mill. Tolerances and max/min levels, when stated, are based upon 95% confidence interval within each production run. Read more about testing methods in our section about General Technical Information.

Online version

Access the online version of this spec sheet on:
iggesund.com/incada-silk