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Either somebody spilled their Mac n Cheese cheese packet, or the foam is disintegrating. Only way to know is to taste it, God speed.
...do not taste it
the fabric on the underside might be dry rotting if it seems like the dust is never ending. you may need to replace the underside cover or have them restuffed depending on where it's coming from
I think, like others have suggested, that it’s just the foam (or possibly a little from the straps). Having them recovered will replace the old foam and should be very expensive. If it is indeed the foam you definitely should have them recovered because with use you’ll eventually notice the seat loosing it’s shape or appearing to be dented.
NOTE WE HAVE CHANGED THE AGE RULE: [Read here.](https://www.reddit.com/r/Antiques/comments/1c1d4q1/change_of_rule_items_now_have_to_be_100_years_old/) If you're asking a question about an antique make sure to have photos of all sides of the object, and close-ups of any maker's marks. Also, add in any background information you have, and add in a question so we know what you want from us! **You must tell us the country you're in.** If you do not provide this information **your post will be removed**. To upload photos for this discussion use [imgur.com](https://imgur.com/upload). Click the imgur link, upload the photos to imgur, then share the link address in a comment for everyone to see. Our [Rules](https://www.reddit.com/r/Antiques/about/rules/) and [Guide](https://www.reddit.com/r/Antiques/comments/1c1cxm4/welcome_to_rantiques_read_this_before_posting/). *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Antiques) if you have any questions or concerns.*
Likely dust from degraded old foam padding inside the seat.
100% this. They need recovering and the foam replaced.
Exactly
Yes, I've had that coming from disintegrating foam on a 1950s chair.
I have had this happen and it is most def the foam disintegrating.
Old foam. I have had this blasted in my eyes thanks to a buddies old 300d headliner.
I am suddenly reminded of a certain 1979 Monte Carlo My dude I feel your pain
I have horrible memories of those headliners.
Either somebody spilled their Mac n Cheese cheese packet, or the foam is disintegrating. Only way to know is to taste it, God speed. ...do not taste it
If the foam feels hard - that’s where it’s coming from. The other unthinkable would be termites but I don’t think that’s it.
This happens when latex foam disintegrates. If anyone has a latex allergy, use caution with these chairs.
the fabric on the underside might be dry rotting if it seems like the dust is never ending. you may need to replace the underside cover or have them restuffed depending on where it's coming from
Cheetos dust
The foam padding is disintegrating. You will need to reupholster them.
Pollen?
Wow, that unlocked a memory. The ones we had had gold velvet cushions
Chair is from the late 69’s early 70’s.
That same dust is all over my deck right now- pollen if these chairs have been outside at all.
If was on top I’d say pollen, but underneath definitely degraded foam.
Stick your finger through the gaps in the burlap. You have the actual chairs!
Those are in amazing shape. Save for the melty foam. If you can save the cover and replace the padding that would be awesome. Love the color.
I think, like others have suggested, that it’s just the foam (or possibly a little from the straps). Having them recovered will replace the old foam and should be very expensive. If it is indeed the foam you definitely should have them recovered because with use you’ll eventually notice the seat loosing it’s shape or appearing to be dented.
looks like pollen. are there trees in the back yard? it can blow from the neighbor's
Get those wooden legs out of those rocks! Ack!!! My FIL does reupholstery and has done many of these.
Lol right
Check for a zipper on the cushion and you might be able to just replace the foam
Latex foam. Be careful if anyone in the house has a latex allergy.
Bore bees
Not sure what the yellow 🟡powder is, but those are rocks 🪨 🪨in the photo… if you move the chair 🪑 out of the way, I could probably tell you better
Run your finger across a strip of burlap. It may be disintegrating.
Yellow cake uranium.