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Sterilizing Kilner jars
"harryagain" wrote in
: "Janet" wrote in message t... In article , says... You could do it by putting your filled jars in a pressure cooker. You would need to be certain all parts of the contents were heated through. Have you never used a pressure cooker? You would need to be certain they were cool (unpressurised before opening the pressure cooker. Nobody who has ever used a pressure cooker would find it remotely difficult to depressurise or cool. So even then a bit dodgy. Using a pressure cooker is not in the least bit uncertain difficult or dodgy; just unnecessary in this instance. http://www.1900s.org.uk/1940s50s-preserving-fruit.htm http://www.kilnerjar.co.uk/Preserving/guides/how-to- preserve#.UixMLH8WYuc Janet Clearly you are one that needs to be made aware of the dangers. If you rapidly depressurise a pressure cooker and there is a closed container inside, the container may explode due to over pressure and/or thermal shock. Careful here! Janet is the expert on everything. It likes to think so, but nope it is a dope. Baz |
#3
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Sterilizing Kilner jars
In article ,
says... "Janet" wrote in message t... In article , says... You could do it by putting your filled jars in a pressure cooker. You would need to be certain all parts of the contents were heated through. Have you never used a pressure cooker? You would need to be certain they were cool (unpressurised before opening the pressure cooker. Nobody who has ever used a pressure cooker would find it remotely difficult to depressurise or cool. So even then a bit dodgy. Using a pressure cooker is not in the least bit uncertain difficult or dodgy; just unnecessary in this instance. http://www.1900s.org.uk/1940s50s-preserving-fruit.htm http://www.kilnerjar.co.uk/Preserving/guides/how-to- preserve#.UixMLH8WYuc Janet Clearly you are one that needs to be made aware of the dangers. If you rapidly depressurise a pressure cooker and there is a closed container inside, the container may explode due to over pressure and/or thermal shock. Who said "rapidly depressurise a pressure cooker"? Take it off the heat. Do nothing. That's how easy it is. The pressure cooker will depressurise all by itself. Janet |
#4
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Sterilizing Kilner jars
On Sun, 8 Sep 2013 20:41:55 +0100, Janet wrote:
Clearly you are one that needs to be made aware of the dangers. If you rapidly depressurise a pressure cooker and there is a closed container inside, the container may explode due to over pressure and/or thermal shock. If a closed container in a pressure cooker hasn't already exploded... AIUI the containers are not sealed until they have been through the high temperature/pressure process and cooled to be accessable at room pressure. Any lids etc also need to have gone through the high temp/pressure so presumably they are loosely fitted to keep most of the water/steam out of the product and tightly fitted whilst everything is still very hot. Who said "rapidly depressurise a pressure cooker"? Take it off the heat. Do nothing. That's how easy it is. The pressure cooker will depressurise all by itself. Once you take the weights off... Will the pressure drop to atmospheric in a sensible time scale once removed from the heat and weights left on? I guess you let it cool 'till it stops hissing from the weights then keep trying to lift the weights without it blowing too much, FSVO "too much" steam out. I've no great experience of pressure cookers, My Mum didn't like 'em so we never had one at home. -- Cheers Dave. |
#5
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Sterilizing Kilner jars
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#6
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Sterilizing Kilner jars
On 9/9/2013 4:01 PM, Martin wrote:
On Mon, 9 Sep 2013 18:07:35 +0100, Janet wrote: If I DO want the PC to depressurise quickly, I take it off the heat and slip a knife point through the ring on the weight and tilt it, which releases steam fast. Once it stops hissing you lift off the weight and can open the lid. I use a fork or put the pressure cooker in the sink and run cold water over it. My doesn't have weights, but it does have a quick-release setting. |
#7
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Sterilizing Kilner jars
On 9/10/2013 5:30 AM, Martin wrote:
On Mon, 09 Sep 2013 19:22:31 -0400, S Viemeister wrote: On 9/9/2013 4:01 PM, Martin wrote: On Mon, 9 Sep 2013 18:07:35 +0100, Janet wrote: If I DO want the PC to depressurise quickly, I take it off the heat and slip a knife point through the ring on the weight and tilt it, which releases steam fast. Once it stops hissing you lift off the weight and can open the lid. I use a fork or put the pressure cooker in the sink and run cold water over it. My doesn't have weights, but it does have a quick-release setting. Our current pressure cooker is a Fagor bought in Lidl. It doesn't have weights either. For decades we used a Prestige, which does use weights. Mine is also a Fagor, bought in Costco. |
#8
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Sterilizing Kilner jars
On 09/09/2013 10:38, Dave Liquorice wrote:
On Sun, 8 Sep 2013 20:41:55 +0100, Janet wrote: Clearly you are one that needs to be made aware of the dangers. If you rapidly depressurise a pressure cooker and there is a closed container inside, the container may explode due to over pressure and/or thermal shock. If a closed container in a pressure cooker hasn't already exploded... It should be mostly OK provided that the pressure in the container is coupled to the pressure in the autoclave the boiling point of the water inside it will also be raised. Conversely the water inside the container will boil until it matches the working pressure in the cooker. AIUI the containers are not sealed until they have been through the high temperature/pressure process and cooled to be accessable at room pressure. Any lids etc also need to have gone through the high temp/pressure so presumably they are loosely fitted to keep most of the water/steam out of the product and tightly fitted whilst everything is still very hot. I think for home canning it is supposed to be fully sealed and then aggressively pressure cooked. Not sure how well Killner jars would stand up to it. We blanch and then freeze pea & bean gluts. Who said "rapidly depressurise a pressure cooker"? Take it off the heat. Do nothing. That's how easy it is. The pressure cooker will depressurise all by itself. Once you take the weights off... Will the pressure drop to atmospheric in a sensible time scale once removed from the heat and weights left on? I guess you let it cool 'till it stops hissing from the weights then keep trying to lift the weights without it blowing too much, FSVO "too much" steam out. I've no great experience of pressure cookers, My Mum didn't like 'em so we never had one at home. Sudden decreases in pressure are a very bad thing as flash boiling inside some thick goupy stew or soup inside one is a disaster! I have distant recollections of conical fountains of scalding soup flying up into the air plastering the kitchen ceiling and bouncing all over at my aunts. They are fine if used correctly but there is scope for considerable excitement if you make a mistake at high pressure. ISTR some kind of emergency pressure release system triggered on it. -- Regards, Martin Brown |
#9
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Sterilizing Kilner jars
On 10/09/13 12:09, Martin Brown wrote:
On 09/09/2013 10:38, Dave Liquorice wrote: On Sun, 8 Sep 2013 20:41:55 +0100, Janet wrote: I've no great experience of pressure cookers, My Mum didn't like 'em so we never had one at home. Sudden decreases in pressure are a very bad thing as flash boiling inside some thick goupy stew or soup inside one is a disaster! OTOH, flashing water into steam *may* be a good way of disrupting structures and possibly cells. Might be useful when turning fish/meat/veg into stock. Easily done by lifting up the weight - and watching the steam spray 2ft horizontally from each of four holes. Good for startling guests/kids I'd get worried if there *wasn't* any steam coming from weight, because... I have distant recollections of conical fountains of scalding soup flying up into the air plastering the kitchen ceiling and bouncing all over at my aunts. They are fine if used correctly but there is scope for considerable excitement if you make a mistake at high pressure. The next stage on mu cooker is a rupture plate under the lid's handle, so the contents wouldn't hit the ceiling but would probably splatter sideways. ISTR some kind of emergency pressure release system triggered on it. |
#10
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Sterilizing Kilner jars
In article ,
Tom Gardner wrote: On 10/09/13 12:09, Martin Brown wrote: On 09/09/2013 10:38, Dave Liquorice wrote: On Sun, 8 Sep 2013 20:41:55 +0100, Janet wrote: I've no great experience of pressure cookers, My Mum didn't like 'em so we never had one at home. Sudden decreases in pressure are a very bad thing as flash boiling inside some thick goupy stew or soup inside one is a disaster! OTOH, flashing water into steam *may* be a good way of disrupting structures and possibly cells. Might be useful when turning fish/meat/veg into stock. Easily done by lifting up the weight - and watching the steam spray 2ft horizontally from each of four holes. Good for startling guests/kids Mopping up the stock before use is a little fiddly :-) Regards, Nick Maclaren. |
#11
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Sterilizing Kilner jars
On 10/09/13 12:50, Nick Maclaren wrote:
In article , Tom Gardner wrote: On 10/09/13 12:09, Martin Brown wrote: On 09/09/2013 10:38, Dave Liquorice wrote: On Sun, 8 Sep 2013 20:41:55 +0100, Janet wrote: I've no great experience of pressure cookers, My Mum didn't like 'em so we never had one at home. Sudden decreases in pressure are a very bad thing as flash boiling inside some thick goupy stew or soup inside one is a disaster! OTOH, flashing water into steam *may* be a good way of disrupting structures and possibly cells. Might be useful when turning fish/meat/veg into stock. Easily done by lifting up the weight - and watching the steam spray 2ft horizontally from each of four holes. Good for startling guests/kids Mopping up the stock before use is a little fiddly :-) At least I could easily and rapidly sterilise it in a pressure cooker. Oh, wait... |
#12
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Sterilizing Kilner jars
On 9/10/2013 12:14 PM, Martin wrote:
On Tue, 10 Sep 2013 12:09:20 +0100, Martin Brown I have distant recollections of conical fountains of scalding soup flying up into the air plastering the kitchen ceiling and bouncing all over at my aunts. They are fine if used correctly but there is scope for considerable excitement if you make a mistake at high pressure. ISTR some kind of emergency pressure release system triggered on it. Usually caused by overfilling the pressure cooker. My mother acquired her pressure cooker from a neighbour, after the neighbour's kitchen suffered a major eruption of pea soup. |
#13
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Sterilizing Kilner jars
Somebody said ....
""ISTR some kind of emergency pressure release system triggered on it."" A little valve which had to be replaced every so often. Our Prestige Pressure Cooker had so much use in the early days that it developed a rounded bottom and rocked on the cooker. Nothing to do with gardening I know, but I thought I would join in :-) (Not a moderated forum yet is it?) Mike "Martin" wrote in message ... On Tue, 10 Sep 2013 12:09:20 +0100, Martin Brown wrote: I have distant recollections of conical fountains of scalding soup flying up into the air plastering the kitchen ceiling and bouncing all over at my aunts. They are fine if used correctly but there is scope for considerable excitement if you make a mistake at high pressure. ISTR some kind of emergency pressure release system triggered on it. Usually caused by overfilling the pressure cooker. -- Martin in Zuid Holland |
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