|
|
Author |
|
Message | |
|
Deedee
Joined: 10 Jan 2005 Posts: 250 Location: Surrey
|
|
|
|
|
Fee
Joined: 21 Mar 2005 Posts: 15922 Location: Earth
|
|
|
|
|
bagpuss
Joined: 09 Dec 2004 Posts: 10507 Location: cambridge
|
|
|
|
|
Cathryn
Joined: 16 Jul 2005 Posts: 19856 Location: Ceredigion
|
|
|
|
|
Bugs
Joined: 28 Oct 2004 Posts: 10744
|
|
|
|
|
Deedee
Joined: 10 Jan 2005 Posts: 250 Location: Surrey
|
|
|
|
|
Deedee
Joined: 10 Jan 2005 Posts: 250 Location: Surrey
|
|
|
|
|
judith
Joined: 16 Dec 2004 Posts: 22789 Location: Montgomeryshire
|
|
|
|
|
moggins
Joined: 24 Feb 2005 Posts: 942 Location: Gloucester
|
|
|
|
|
judith
Joined: 16 Dec 2004 Posts: 22789 Location: Montgomeryshire
|
|
|
|
|
Sarah D
Joined: 28 Oct 2004 Posts: 2584
|
|
|
|
|
cab
Joined: 01 Nov 2004 Posts: 32429
|
|
|
|
|
Cathryn
Joined: 16 Jul 2005 Posts: 19856 Location: Ceredigion
|
|
|
|
|
Pilsbury
Joined: 13 Dec 2004 Posts: 5645 Location: East london/Essex
|
|
|
|
|
cab
Joined: 01 Nov 2004 Posts: 32429
|
Posted: Fri Feb 17, 06 7:36 pm Post subject: |
|
When you bottle marmalade, you're dealing with a sugar solution that has been heated, with some acid, to 105C for a period of time. Its pretty much dead. When someone opens it at room temperature, then immediately mold spores have found their way in. If said spores can cope with the sugar content and the acidity (less of a problem on top!) then they will, eventually germinate.
Putting the caps on top when the marmalade is still hot means that the marmalade will contract, the hot air will contract, and you've now got a rather low partial pressure of oxygen in there. That means that not only is nearly everything dead, but any meagre survivors have to be able to cope with that too.
Now you CAN put the marmalade in hot water and heat it again; might work. But that isn't in any way the equivalent of proper cooking of the marmalade, and actually getting the marmalade hot enough right through the jar to kill spores off is unlikely.
So... I'd go for sterilising the top, exposed surface and rely on the fact that the body of the marmalade isn't a good place to live. That ought to do it. |
|
|
|
|
|