Fortress™ PET Ovenable Paperboard

Specifically designed for frozen food applications that will be baked or microwaved by the consumer, Fortress™ PET ovenable paperboard has a special coating that performs across a wide temperature range, from below freezing to 400°F. 

Made from bleached paperboard (also known as solid bleached sulfate or SBS) and available in a variety of options, Fortress PET ovenable paperboard delivers excellent product integrity and excellent print results for strong shelf appeal. 

With consistent quality and proven performance, Fortress PET ovenable paperboard is ideal for a variety of food packaging applications, including frozen foods and limited-service restaurants. 

Fortress™ PET Ovenable Paperboard

Fortress PET Ovenable Paperboard Sustainability Benefits

Sustainability Benefits
Renewable Resource

Unlike plastic and other packaging materials that are extracted from the earth, Fortress PET ovenable paperboard is made from up to 90% renewable resources. 

Fortress PET Ovenable Paperboard Features

Fiber Procurement and Chain of Custody
  • Graphic Packaging International is compliant with Forest Stewardship Council®, Sustainable Forestry Initiative®, and Programme for the Endorsement of Forest Certification™ Chain of Custody forest certification standards 
Environmental and Safety
  • Complies with California’s Safe Drinking Water and Toxic Enforcement Act of 1986 (California Proposition 65)
  • Complies with European Union Regulation (EC) No 1907/2006 concerning the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)
  • Contains no REACH Substances of Very High Concern (SVHC) at levels above the 0.1% threshold 
  • Bleaching: Elemental Chlorine Free (ECF) bleached fiber
  • Complies with CONEG/Toxics in Packaging laws and with Article 11 of the EU Packaging and Packaging Waste Directive (94/62/EC) 
  • Paperboard is manufactured from plant-based fiber from sustainably managed forests. As there is no specific test for paper compostability, it is recommended that ASTM 6400, 6868, or similar test methods are used to verify the compostable nature of paperboard or paperboard packaging.  
Machine Models
  • Mills are third-party certified to the ISO 9001:Quality Management System standards

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Fortress PET Ovenable Paperboard

Product Information

Room mates standing in a kitchen holding frozen dinner options
  • Frozen foods  

Excellent printability

  • Fortress PET ovenable paperboard is available in calipers from 14pt to 24pt and provides industry-leading product integrity
  • Fortress PET for carton applications has a superior printing surface that is engineered to deliver excellent print results for strong shelf appeal
  • Fortress PET for deep-drawn trays is engineered to form industry-leading trays that perform in conversion, food placement, and with the consumer

Delivers great cooking results

  • Stands up to the heat and moisture of microwave cooking  
  • Offers outstanding performance in conventional ovens up to 400°F, withstanding 60 minutes with a full load and up to 30 minutes without
  • With a specially designed extruded polyester coating, Fortress PET ovenable paperboard is perfectly suited for food packaging applications, including frozen foods, as well as limited-service restaurants 

Consistent performance in a variety of converting processes

  • Carefully monitored board production and testing ensures that Fortress PET ovenable paperboard will run consistently well in all of your printing and converting operations while providing superior package integrity despite fluctuations in temperature and moisture levels 

Folding Cartons

Basestock PropertiesUnits14pt16pt18pt20ptStandard
ThicknessMicrons373 421 472 526 T-411
BrightnessGE87.5 87.5 87.5 87.5 T-452


Basestock PropertiesUnits16.3pt18pt19pt20pt24ptStandard
CaliperInches0.0170 0.01870.01970.02070.0247T-411
ThicknessMicrons432 457500526627T-411
BrightnessGE87.5 87.5 87.5 87.5 87.5 T-452

Food contact compliance

  • FDA and EU-compliant for contact with aqueous and fatty foods, as well as dry foods 

Food contact compliance (USA)

  • 21 CFR 176.170 (components of paper and paperboard in contact with aqueous and fatty foods)
  • 21 CFR 176.180 (components of paper and paperboard in contact with dry foods) 

Food contact compliance (EU)

  • Article 3 of Regulation (EC) No 1935/2004 on materials and articles intended to come into contact with food
  • Commission Regulation (EU) No 10/2011 on plastic materials and articles intended to come into contact with food, as applicable
  • Manufactured in accordance with Commission Regulation (EC) No 2023/06 on good manufacturing practice for materials and articles intended to come into contact with food