PSA: last night one of our pyrex cooking dishes exploded.
not fractured, exploded. “pyrex isn’t supposed to do that” we thought.
as of a few years ago, Pyrex sold their brand, the new company changed glass recipe as a cost cutting measure, resulting in a pandemic of exploding cookware and a class action lawsuit.
thankfully the patent has expired and the keyword to look for in competing glass cookware products is “borosilicate glass”
@zensaiyuki i didn't know they sold the brand. not surprised, thank you.
@zensaiyuki about 6-8 years ago, I slept over at a friend's house for his birthday and they cooked a macaroni and cheese casserole and the Pyrex baking dish it was in just spontaneously shattered while cooling, making a mess and ruining a large amount of food in the process
Fwiw, as of when I looked into it, Pyrex labware is still made of the good glass, it's just the bakeware that's bad now
@zensaiyuki I had that happen about ten years ago! It was terrifying!
@zensaiyuki i remember reading this is only a thing in the US and european pyrex has always been borosilicate? Might be worth a double check
...i sure hope the laboratory glassware is still borosilicate. That could cause some *major* problems if they started using soda-lime glass instead
@Felthry in Australia. our pyrex exploding seemed pretty real. someone else replied here that lab pyrex is still borosilicate.
the new formula SHOULD be safe as long as it isn't moved between hot/cold environments without a room temperature period in the middle, but the all-caps PYREX ones are the much safer borosilicate glass
i believe? the older formula also looks a little more yellow, but i can't verify
@Galuade @Felthry @zensaiyuki looks like they're still using the PYREX label so most likely labware is still borosilicate, yeah https://www.corning.com/cala/en/products/life-sciences/resources/brands/pyrex-brand-products.html
@Kat @Felthry @zensaiyuki https://ecatalog.corning.com/life-sciences/b2c/US/en/General-Labware/Beakers/Beakers%2C-Glass/PYREX%C2%AE-Beakers%2C-Low-Form%2C-Double-Scale%2C-Graduated/p/1000-PACK this actually seems like a reasonable price for as assortment of high-quality glassware
unfortunately most stuff other than these assortment packs are sold by the case
@Galuade it's missing the best one though, the 5mL beaker
never actually used one of those but there was always at least one sitting out in our high school chemistry lab and it was the Best Thing
@zensaiyuki Ugh, because of course it was all about cutting costs 😒 it's always some rich jerk trying to save money.
I'm curious – do you know what kind of glass the shattering Pyrex things are made from?
@InvaderXan soda lime
Ohhh tempered soda lime glass! That explains the explosion. Geez, why couldn't they just stick to borosilicate like any sensible person?
@InvaderXan it would be fine if we knew what it was beforehand. “pyrex” kinda sets expectations. it’d be like buying oreos, opening the package and finding vanilla wafers. nothing wrong with them but it’s not what i bought! except with a hot exploding glass twist.
@zensaiyuki Right?? Damn, I didn't realise I needed to actually check what kind of glass I was buying these days. That's annoying.
@zensaiyuki I actually had to explain this to one of my science teachers once, that was a cursed as hell day.
@zensaiyuki I think they were thinking of the lab stuff, which iirc is still fine? but to say "oh, yeah, pyrex is perfectly fine in heat" isn't a good thing to say to an entire class with no qualifiers
@zensaiyuki I had a measuring jug explode a while ago! At room temperature, standing on a room-temperature stone countertop, so it can't have been temp differentials. Fortunately it was empty so I only had to clean up glass, not glass and some possibly sticky or greasy liquid.
@irina was it “pyrex”?
@zensaiyuki Arcuisine, but made of the same type of glass.
@zensaiyuki Exploded?! That's pretty fucking serious.
Is there any literature/studies on this?
@ferds just search “exploding pyrex”, there’s tonnes of stuff. someone pointed out to me earlier that PYREX all caps is a different glass and brand from “pyrex” lowercase. the background is on wikipedia.
@zensaiyuki definitely good to know! D:
Old pyrex could explode too, if you did terrible things to it. I had one go in the late 80s.
To be fair, my roommate had turned on the wrong burner on the hob, heated the pyrex to a temperature I like to describe as 'really hot' and then dumped cold tomato sauce on it.
Hot pyrex shards burned marks into my linoleum floor. It's a bloody miracle no one was hurt.
@zensaiyuki Pyrex in Europe is still borosilicate
@zensaiyuki I also learned this fact the hard way. It was about 7 years ago. I was being a dumbass and left an empty pyrex pan on an active electric stove burner.
Luckily, when the thing exploded into tiny pieces, I was on the other side of my studio apartment. No one was hurt, and no real damage was inflicted.
The Pyrex pan chose a fitting time to explode. I was watching Zombieland, and a shooting scene had just started.
@zensaiyuki oof, yeah, the soda-lime glass problem. Sorry that happened. I hope cleanup wasn't too much trouble.
@gnomon i wish I knew how to clean up glass in a way that doesn’t leave 1000 tiny invisible foot lacerating shards
Not gonna lie, misread that as "glass action lawsuit"
@RussSharek @zensaiyuki Glass cookware collector here. Corning sold off their housewares division 20+ years ago but even back then most of their ovenware was not borosilicate. They claim it's because borosilicate is more likely to break if dropped. If you want to use something on the stove top you're looking for Corning Vision, which you can often find for cheap in thrift shops in the US, or is still made new in France.
@zensaiyuki "as of a few years ago" - 1998, to be exact.
If you're looking for Pyrex that won't explode (or at least is far less likely to), check the logo. If it's all caps e.g. "PYREX", then this is the version of the trademark which covers borosilicate glass. The lowercase version of the trademark e.g. "pyrex" is the one used on soda-lime products.
@TerrorBite unclear which year this started happening in Australia. check out all the other replies in this thread.
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