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Invercote Duo

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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. The coating composition is adjusted in different general directions for the product family to satisfy printability requirements.

Product description

Invercote Duo is made through back-to-back pasting of double coated Invercote. This standard version has identical printing surfaces on the front and back. Alternative versions are available with, for example, front-to-back pasting to achieve special properties or appearances. Due to its strength, toughness and thickness, Invercote Duo is especially suitable for different types of rigid, exclusive packs, the packaging of aroma and flavour sensitive products, and various display purposes.

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

Certifications Invercote & Inverform

Product related

ECF

PEFC credit material

FSC® Mix FSC-C110018

Food contact

Toy safety

Archiving
   

2778 PEFC

TUEV-COC-000232

EC 1935/2004,
EC 2023/20061),
American FDA,
German BfR

EN 71 Part 3,
ISO 8124-3:2010

ISO 9706
 

All fibres from sustainable and controlled sources in compliance with the EU Timber Regulation EC 995/2010.

Mill related

ISO 14001

ISO 9001

FSC® C. o. C.

PEFC C. o. C.

    
 

EcoVadis Platinum Standard2)
 

1) the GMP regulation, extended with CEPI GMP

2) EcoVadis Platinum Medal awarded in 2020 (top 1 procent of all companies assessed)

Our mills and products are certified according to a number of standards, ISO and forestry. These standards are indicated on each specification sheet, as well as if they are compliant with application specific standards such as food contact, toy and archive. For more detailed information about our certificates, visit iggesund.com/certificates.

Sheet grain direction

Grain results from the fact that fibers flowing onto the paper machine wire align themselves predominantly in the direction of their flow and the moving wire. The direction that is parallel to the flow of fibers on the wire is called the Machine Direction (MD). Direction perpendicular to the machine direction, or across the paper machine wire, is called the Cross Machine Direction (CD). Grain direction is called long-grain (or grain-long) when the longer sheet dimension is the same as, or parallel to, the machine direction. Shortgrain paperboard has its shorter sheet dimension parallel to machine direction. A diagram of each is below:

Properties - Print side

Tolerances Methods/Remarks
Grammage (g/m²) 450-770 +/-6% ISO 536
Colour L* - PS 96.7 +/-0.8 ISO 5631-2
Colour a* - PS 2.5 +/-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

Last updated 28 Jun 2021

Properties - Reverse side

Tolerances Methods/Remarks
Grammage (g/m²) 450-770 +/-6% ISO 536
Colour L* - RS 96.4 - ISO 5631-2
Colour a* - RS 2.0 - ISO 5631-2
Colour b* - RS -5.0 - ISO 5631-2
Whiteness - RS (%) 110 - ISO 11475
ISO Brightness R457 - RS (%) 90 - ISO 2470
Cobb - RS (g/m²) 30 ≤40 ISO 535

Last updated 28 Jun 2021

Properties

Tolerances Methods/Remarks
Grammage (g/m²) 450-770 +/-6% ISO 536
Moisture content (%) 7.5 ≤1.0 ISO 287
Robinson taint (no) <0.6 - EN 1230, DIN 10955
Edge Wick test (kg/m²) 2 ≤2 -
Direct emission CO2 (kg CO2/ton) 39 - CEPI Framework
Indirect emission CO2 (kg CO2/ton) 1 - CEPI Framework
Carbon footprint (kg CO2/ton) 184 - CEPI Framework

Last updated 28 Jun 2021

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 23.9 26 28.3 31.1 34.3 36.6 39.8 +/-6% -
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
Bending resistance L&W 15° - CD (mN) 530 718 893 1108 1311 1765 2044 2407 -15% ISO 2493
Bending moment Taber 15° - MD (mNm) 51 66 85 105 126 166 191 222 -15% ISO 2493
Bending moment Taber 15° - CD (mNm) 26.0 35.0 43.0 54.0 63.0 85.0 99.0 116.0 -15% ISO 2493

Last updated 28 Jun 2021