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What are they using now instead of PFAS?

> Shorter chain-length PFAS telomeric substances have been submitted to EPA for review as alternatives for a variety of uses including, for example, textile, carpet and paper additive uses and tile surface treatments.

1. https://www.epa.gov/assessing-and-managing-chemicals-under-t...

That's incorrect. The voluntary phase-out covers all PFAS inclusive of shorter-chain molecules.

The most likely replacement are food-grade silicone alternatives. Silicone alternatives are also being used in waterproofing rain jackets, etc. (see Patagonia for example, who started by using C6, shorter chain PFAS, instead of C8, but now has switched to PFAS-free)

I've got some nonstick greaseproof paper in the cupboard that's apparently lined with silicone.

Parchment paper, butcher paper etc can have a variety of different treatments used. PFAS is a common one. Silicone or a combination of PFAS and silicone is another one. Acid treated without a coating is less common although that was the original parchment paper back in the day. Personally, I use "If you care" brand from whole foods which has been independently tested to have the least PFAS.

This voluntary phase-out doesn't include parchment paper you use at home. It's for food packaging

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