King Arthur Baking · Parchment Paper & Baking Liners
Amazon.com : King Arthur Flour Precut Baking Parchment Paper, Heavy Duty, Professional Grade, Nonstick, Reusable, Reseal
Skip until King Arthur discloses coating chemistry or PFAS status.
King Arthur's parchment paper is marketed as nonstick and reusable but provides no ingredient disclosure or PFAS claims. Nonstick food-contact paper typically uses Teflon-family coating coatings; absence of transparency raises concern.
The better-graded swap
If You Care
If You Care Parchment Baking Paper
90/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Bleached paper with nonstick coating, composition unspecified
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Amazon.com : King Arthur Reusable, Reseal is made of, ingredients and materials
This product is bleached paper with an applied nonstick coating of unspecified chemistry. King Arthur does not publicly disclose whether the coating contains Teflon-type coating (Teflon), silicone, or another compound. Bleaching itself is standard food-contact practice, but the nonstick layer is the primary chemical unknown. Reusability claims depend on coating durability, which degrades with repeated heat and abrasion.
What’s concerning
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Vague safety claims only
Uses vague language ("eco-friendly", "clean") without a specific PFAS statement.
PFAS
Coating chemistry is not disclosed by the manufacturer. If silicone-based, risk is lower; if fluorocarbon-based, PFAS exposure is possible, especially above 350°F. No independent testing results for this specific product are publicly available.
Source, ATSDR ↗Coating degradation and flaking
Reusable parchment coatings degrade over time with heat cycles and mechanical wear. Flaked coating particles may be ingested if not visually inspected before use. Bleached paper itself becomes structurally weaker once coating is compromised.
Heat stability of nonstick layer
Silicone and fluorocarbon coatings both degrade at high temperatures, releasing volatile organic compounds. Exact degradation temperature is unknown without coating identification. Repeated use near or above 420°F accelerates breakdown.
Microplastic or particulate shedding
As a coated paper product subject to repeated heating and mechanical stress, fine particulates may shed into food over multiple reuses. Risk increases as coating deteriorates. No documented cases specific to this brand, but inherent to the reusable coated-paper category.
What’s reassuring
Bleaching residues
Food-contact bleached paper is regulated and residues are generally considered low-risk at typical use temperatures. No documented issues specific to King Arthur parchment have been recorded, but complete bleach removal is never 100 percent guaranteed in manufacturing.
How is this PFAS grade calculated?
The brand's record and disclosure
King Arthur Baking Company does not publicly disclose coating chemistry or PFAS status for this product on available product pages or safety documentation reviewed. The brand has not published third-party certifications (such as NSF, GOTS, or fluorine-free claims) for this parchment. Absence of disclosure is common among parchment manufacturers but leaves users unable to verify chemical safety claims.
How it compares in its category
Most commercial baking parchment uses either silicone or fluorocarbon (PFAS-containing) coatings; few brands disclose which. Unbleached parchment avoids chlorine bleach residue but may have lower heat tolerance. Reusable silicone baking mats eliminate coating reapplication but require careful cleaning. King Arthur's 'heavy duty' marketing suggests thicker paper and likely a durable coating, but durability alone does not indicate chemical safety.
If you buy it
Use only at temperatures below 420°F (most parchment degrades or releases volatile compounds above this). Replace immediately if coating flakes, yellows excessively, or becomes sticky. Hand wash gently after each use; abrasive scrubbing accelerates coating failure. Store in a cool, dry place to prevent moisture degradation. Do not use for direct contact with acidic foods (lemon, tomato) for extended periods, as acid can compromise some coatings.
What is not known about PFAS in this product?
- Basis
- Model estimate, 35% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- King Arthur Baking has made none
Formulations change between production runs, so check the current label. How we grade.
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- The brand calls it PFAS-free, which we have not verified
- Nonstick coating degradation over time
3 hazards checked on this product, all on its full breakdown.
- plastic tube with replaceable hollow-fiber filter cartridge
- The brand calls it PFAS-free, which we have not verified
- Bacterial growth in filter and housing if unmaintained
2 hazards checked on this product, all on its full breakdown.
- silicone-coated parchment paper
- The brand calls it PFAS-free, which we have not verified
- Paper degradation and particulate shedding
More parchment paper & baking liners grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.