Invercote Duo

Invercote Duo

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Solid Bleached Board

Solid Bleached Board

Invercote is a multi-layered product (solid bleached board, SBB), entirely based on fresh fibres. Specific fibre compositions are used for the various layers in the construction to optimise performance. The outer layers are dominated by hardwood fibres to promote smoothness and printability. The middle layer consists of softwood fibres for strength and flexibility.

Product description

Invercote Duo expands creative possibilities due to its excellent printability and colour reproduction. The standard version is made through back-to-back pasting of triple-coated Invercote, which enables two identical printing surfaces. Alternative versions are available, with front-to-back or front-to-front pasting, to achieve special properties or appearances.

Duo-products can also be made by Holmen’s formable solid bleached board Inverform, or by combining different paperboard grades and grammages. Lamination of up to three or four layers of paperboard is also possible.

Due to its strength, toughness, and thickness, Duo is ideal for packaging wines and spirits, gift cards, and different types of rigid exclusive packs and displays.

All Duo-products can be improved with various surface treatments to add desired barrier functions and visual effects – just talk to your local sales representative. 

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

Invercote/Inverform
Certifications & Standards

Product related

PEFC
credit
material

FSC® Mix

Food safety

Archiving

Toy safety

2778 PEFC

TUEV-COC-000232

EC 1935/2004

EC 2023/2006

FDA 21 CFR

German BfR XXXVI

Acid free

EN 71 Part 3

EN 71 Part 9
All fibres from sustainable and controlled sources in compliance with the EU Timber Regulation EC 995/2010.
EcoVadis Platinum Medal awarded in 2024 (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 - Both sides identical

Tolerances Methods/Remarks
Grammage (g/m²) 450-770 +/-6% ISO 536
Colour L* - PS 96.7 +/-0.8 ISO 5631-2
Colour a* - PS 2.3 +/-0.6 ISO 5631-2
Colour b* - PS -7.9 +/-1.1 ISO 5631-2
Whiteness - PS 129 +/-5 ISO 11475
ISO Brightness R457 - PS (%) 94 +/-2 ISO 2470
Surface roughness PPS - PS (µm) 0.9 ≤1.4 ISO 8791-4
Board gloss 75° - PS (%) 40 +/-10 ISO 8254-1
Surface pH - PS 8.5 +1/-1.5 -
Ink Absorption - PS (%) 35 - -
Surface strength IGT blister - PS (m/s) 0.7 ≥0.5 ISO 3783
Surface strength IGT pick - PS (m/s) 1.3 ≥0.8 ISO 3783
Cobb - PS (g/m²) 30 ≤40 ISO 535

Common properties

Tolerances Methods/Remarks
Grammage (g/m²) 450-770 +/-6% ISO 536
Moisture content (%) 7.5 +/- 1 ISO 287
Ply bond (J/m²) 160 NULL 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) 450 490 530 570 610 670 710 770 +/-6% ISO 536
Thickness (µm) 520 600 660 720 790 870 930 1010 +/-6% ISO 534
Caliper (pt) 20.5 23.6 26.0 28.3 31.1 34.3 36.6 39.8 - -
Bending stiffness L&W 5° - MD (mNm) 104.0 136.0 180.0 226.0 279.0 379.0 460.0 557.0 - ISO 5628
Bending stiffness L&W 5° - CD (mNm) 54.0 73.0 93.0 116.0 139.0 189.0 225.0 270.0 - ISO 5628
Bending resistance L&W 15° - MD (mN) 1064 1374 1764 2164 2609 3438 3958 4600 -15% ISO 2493-1
Bending resistance L&W 15° - CD (mN) 530 718 893 1108 1311 1765 2044 2407 -15% ISO 2493-1
Bending moment Taber 15° - MD (mNm) 51 66 85 105 126 166 191 222 - -
Bending moment Taber 15° - CD (mNm) 26.0 35.0 43.0 54.0 63.0 85.0 99.0 116.0 - -

Last updated 30 Nov 2022

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 Iggesund 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/invercote-duo-out-out

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