CathyB
Well-Known Member
I acquired a lovely vintage Pyrex casserole with an etched top from an estate sale. It had the normal nasty baked on grease in the lovely design, and I wanted to restore it to it's pristine state.
The wonderful people at Corning actually have a museum and museum website, and the conservator recommends using...lye! to remove that old black grease.
This was before my soapmaking adventures, so I ended up getting drain cleaner because I couldn't find "lye" locally.
I added about 1T if lye to a small plastic tub filled with about 3 inches of water and let the dish soak a bit. I used a toothpick and a toothbrush to gently scrub the grease, and it all came off. So my generations-old pie plates were next! Victory is mine.
The lye water went down the drain since it was at a lesser concentration than specified for it's original intent.
If you're into old Pyrex, I recommend the site https://www.cmog.org/collection/exhibitions/pyrex
CathyB
The wonderful people at Corning actually have a museum and museum website, and the conservator recommends using...lye! to remove that old black grease.
This was before my soapmaking adventures, so I ended up getting drain cleaner because I couldn't find "lye" locally.
I added about 1T if lye to a small plastic tub filled with about 3 inches of water and let the dish soak a bit. I used a toothpick and a toothbrush to gently scrub the grease, and it all came off. So my generations-old pie plates were next! Victory is mine.
The lye water went down the drain since it was at a lesser concentration than specified for it's original intent.
If you're into old Pyrex, I recommend the site https://www.cmog.org/collection/exhibitions/pyrex
CathyB