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localroger

(3,776 posts)

22. This is typical of tempered glass

Mon Mar 18, 2019, 05:02 PM

Mar 2019

Borosilicate glass doesn't do that. Tempered glass is cooled in such a way that the interior of the glass pulls the outside of the structure together. Since glass is enormously strong this makes it very hard to break; but if you do manage to break it it explodes with much of the energy that was used to melt it, which is stored in its internal structure.

Borosilicate pyrex is resistant to temperature changes because it has a very small coefficient of expansion, so those changes don't set up huge stresses. Tempered glass is resistant because it is held together so strongly by internal forces that the additional stress of a temperature change is a rounding error. But when they do fail, they fail very differently.

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The Pyrex Glass Controversy That Just Won't Die [View all] mahatmakanejeeves Mar 2019 OP

thanks for that information rampartc Mar 2019 #1

Thanks safeinOhio Mar 2019 #2

I always keep an eye peeled at yard sales for Corningware. mahatmakanejeeves Mar 2019 #8

Have some 1950s Hilton International plates made by Corning JCMach1 Mar 2019 #42

I dropped large Pyrex bowl on vinyl flooring and it shattered into million shards wishstar Mar 2019 #3

the way that stuff shatters is very memorable. dixiegrrrrl Mar 2019 #13

This is typical of tempered glass localroger Mar 2019 #22

we need a protest march sign that says Bring Back Borosilicate paulkienitz Mar 2019 #24

if the borosilicate glass (Pyrex) KT2000 Mar 2019 #35

No, the whole point of borosilicate is no stress localroger Mar 2019 #37

PS both borosilicate and tempered glass have been marketed as Pyrex. /nt localroger Mar 2019 #38

thank you - KT2000 Mar 2019 #45

Same thing happened to me. Cracklin Charlie Mar 2019 #26

That happened to me three times and they were memorable BigmanPigman Mar 2019 #28

You will be finding those shards for the next decade. EllieBC Mar 2019 #40

The old stuff feels different to me spinbaby Mar 2019 #4

from LOLcats keithbvadu2 Mar 2019 #5

In one of my more brain-dead moments.... WeekiWater Mar 2019 #6

That's terrifying. Maru Kitteh Mar 2019 #9

Holy heck hibbing Mar 2019 #18

Great matt819 Mar 2019 #7

Same here. I own a Pyrex baking dish. Blue_true Mar 2019 #23

I have a huge collection of Pyrex. About 2/3 is from the 20s-50s sinkingfeeling Mar 2019 #10

tempered glass is waiting to be triggered Hermit-The-Prog Mar 2019 #11

I have had several glass coffee maker carafes shatter too, not just Pyrexes wishstar Mar 2019 #12

I have several sets of Visions cookware Marthe48 Mar 2019 #14

We had two Visions sauce pans happybird Mar 2019 #19

If yours cracked like that, they were the old borosilicate ones localroger Mar 2019 #39

That makes sense happybird Mar 2019 #41

My daughter gave me a set of Visions Marthe48 Mar 2019 #57

I saw a couple of amber Visions saucepans in a thrift store a few years back. blogslut Mar 2019 #53

I buy them every time. xmas74 Mar 2019 #56

Yikes! Honeycombe8 Mar 2019 #15

I use my Corningware and Pyrexware frequently and I've never had one break FakeNoose Mar 2019 #16

I have a Pyrex percolator: Kingofalldems Mar 2019 #17

I have two of those! Kali Mar 2019 #30

We forgot a Pyrex baking pan on the roof of the car once. rickford66 Mar 2019 #20

vintage large lasagna pans in certain desirable colors are worth stupid money. uncle ray Mar 2019 #44

Thou shalt not covet my Pyrex hand-me-downs rickford66 Mar 2019 #46

fortunately they're nearly indestructable. uncle ray Mar 2019 #47

estate sales are great for this stuff. all kinds of vintage kitchen goodies. pansypoo53219 Mar 2019 #21

yes! Kali Mar 2019 #31

Amen eleny Mar 2019 #34

kitchen towels suck Demovictory9 Mar 2019 #50

Borosilicate is superior to tempered soda lime for thermal shock - harumph Mar 2019 #25

There are other options, too. Simax and OXO use borosilicate kcr Mar 2019 #54

In 1997, I was pregnant with my first child. I was 20 assumed it was fine and made spaghetti dewsgirl Mar 2019 #27

Interesting! elleng Mar 2019 #29

okay here's the story from just like 2 weeks ago TalenaGor Mar 2019 #32

Does he take Ambien or anything chemically like it? Cause if so, that's what it is ... mr_lebowski Mar 2019 #52

no sleeping pills but they do make him tired... TalenaGor Mar 2019 #55

Lab Glass Is Always Borosilicate ProfessorGAC Mar 2019 #33

Arc International makes amazing glasses dalton99a Mar 2019 #36

KnR for Pyrex Hekate Mar 2019 #43

My anecdotal experiences with tempered soda-lime and borosilicate glass "Pyrex" in ovens. Hugin Mar 2019 #48

I exploded two of them! putting a hot one straight from oven into sink with cold water. Demovictory9 Mar 2019 #49

I bet your second experience is the most common reason for breakage. Hugin Mar 2019 #51