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Inverform

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Formable Solid Bleached Board

Formable Solid Bleached Board

Inverform 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, flexibility and formability.

Product description

Inverform offers exceptional formability, product consistency, and unique stretch properties that make it ideal for the press-forming and thermoforming technology used to shape trays. It was developed for ready-made food packaging but is also suitable for cutlery and other packaging applications.

Inverform is an uncoated substrate that can be coated, extruded or laminated using all our available extruded barriers;  Polyethylene terephthalate (PET), Polyethylene (PE), and Bio E.

It is made from pure cellulose fibres sourced from sustainably managed forests and complies with FDA and other food hygiene packaging regulations.

Application areas

This product is suitable for the following applications:

cutlery

Cutlery

trays

Trays

plates

Plates

food container

Food container

Invercote/Inverform
Certifications & Standards

Product related

Possible to order as:

  

100% PEFC certified (PEFC/05-33-105)

FSC® Mix Credit 
(FSC-C110018)

Food safety

Archiving

Toy safety

Certificate no:
TUEV-PEFC-COC-117551

Certificate no:
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).
Recyclable according to CEPI Recyclability Test Method - Standard Paper Mill Version 2.
 

Mill related

ISO 9001

ISO 14001

ISO 45001

ISO 50001

FSSC 22000

For more detailed information about our certificates, visit holmen.com/boardandpaper/certifications.

Common properties

Tolerances Methods/Remarks
Grammage (g/m²) 220-380 +/-6% ISO 536
ISO Brightness R457 - PS (%) 85 - ISO 2470-1
Moisture content (%) 8.0 +/-1.5 ISO 287
Cobb - PS (g/m²) 30 - ISO 535
Ply bond (J/m²) 160 ≥110 Tappi 569

Grammage dependent properties

Tolerances Methods/Remarks
Grammage (g/m²) 220 290 330 380 +/-6% ISO 536
Thickness (µm) 295 400 440 530 +/-6% ISO 534
Caliper (pt) 11.6 15.7 17.3 20.9 - ISO 534
Bending resistance L&W 15° - MD (mN) 180 400 570 800 -25% ISO 2493-1
Bending resistance L&W 15° - CD (mN) 80 160 210 320 -25% ISO 2493-1
Surface roughness Bendtsen - PS (ml/min) 400 400 400 700 - ISO 8791-2
Surface roughness Bendtsen - RS (ml/min) 500 600 600 800 - ISO 8791-2

Test methods

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

 

Latest version

Access the latest version of this spec sheet on:
holmen.com/boardandpaper/inverform-technical-data

Related information

Products

Explore our range of innovative paper products and premium paperboards for graphical and packaging applications.

Applications

Our paper and paperboard products are widely used in luxury packaging, book publishing, direct marketing and more.

Sustainability

At Holmen, we are committed to using renewable materials and managing our resources in a sustainable way.