Ball Jars Clean Break

John Liu

I had two glass Ball jars of stock in the refrigerator. I decided to reheat them, to prolong their "shelf life".


The stock is jellied when cold so it won't pour out from the jar into a pot. So I placed the jars in a pot full of hot tap water, with their plastic screw lids on very loosely to allow expansion, then simmered that pot on the range for about 40 min. When I lifted jar #1 from the water bath, all the stock emptied into the pot of water from the bottom of the jar, which was missing. The same thing happened when I lifted jar #2. I fished the jar bottoms from the water and stock. Each is cleanly separated from the rest of the jar, and fits back on so precisely is hard to see they are now separate pieces.


I'm now boiling the pot that is full of water and stock. I figure I can reduce it to a stock concentration, although I may take it further to something even more concentrated and pour it into a ice cube tray. Then I'll strain it in case any glass is present, although I'm pretty sure it would be at most microscopic. The breaks were so perfect and clean.


Why did this happen?


P.S.: I keep this stock to drink. I have a theory that drinking a glass of broth or stock is good for you. And (sssh) it goes well with vodka. Ice cubes would be easy to dose into a glass, then microwave to liquid, add a little celery salt, and there is your Bullshot.

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lindac92

Sitting a glass jar on the bottom of a pot, even full of water....90% chance the glass will break. Do you really need an explanation of un equal expansion,...yadda....coefficient of...yadda...?

Let's just say, always put a rack or at least several thickness of folded towel in the bottom of the pot before you heat glass over direct heat.


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Chessie

" Do you really need an explanation of un equal expansion,...yadda....coefficient of...yadda...?"


LOL! Exactly. I thought it was common knowledge to not do it, but clearly it isn't - so I provided the science. :-)

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John Liu

The stock + water is now just stock again. If I strain it through coffee filters, do you think any worries about errant glass will be addressed?

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bragu_DSM 5

depends upon if it is to be consumed by others other than you. I would not risk it with others, but I would probably risk it (skimming the top and using only the top part) if it is particularly excellent und un re-creatable ... but that is just me

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lindac92

Put it through a coffee filter and drink up.....anything that goes through the filter will be so small it won't hurt you....after all you eat blue berries and their seeds don't you? and don't worry about those tiny seeds.


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leahikesgardenspdx

I agree with Lindac92, think of going to the beach on a windy day, or having a picnic there!

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dcarch7 d c f l a s h 7 @ y a h o o . c o m

I would avoid using the stock.

Broken glass can produce the sharpest edge known to men. As a matter of fact, Obsidian glass surgical knives are being used today to produce the cleanest cuts.

Microscopic glass particles, like asbestos, can have bad health effects. Microscopic glass particle may pass through filters, and may not sink to the bottom of liquids due to molecular Brownian motion.

I agree stock drinking is good for health.

dcarch

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John Liu

You and SWMBO must think alike because she dumped it all down the drain when I wasn't looking :-)

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annie1992

Well, it's too late now, but for the record, I agree with SWMBO, I'd have dumped it. It was two jars of stock, definitely not risking the consumption of glass particles, no matter how tiny.

I do feel for you, though, having been the unwilling participant in my own "thermal shock" experiences. I get about one a year and it's always something messy. Last year it was Chase's chile sauce, the year before it was sweet and sour chicken. Ugh, what a mess in a big canning pot of water, plus especially the chile sauce is a precious commodity here.

My condolences on the stock.

Annie

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