4 ms·
> of course glass can bear that alright Perhaps not in the 1920s though.
by pyre 9y ago
> of course glass can bear that alright
Perhaps not in the 1920s though.
- dpark 9y agoBasic glass formulas haven't changed since long before the 1920s. Even borosilicate glass has been around since the late 1800s.
- Symbiote 9y agoThe setting point of jam is 105°C, so only very slightly cooler. If I remember correctly from making jam with my mother, it's important to pour the really hot jam into the heated jars to ensure everything stays sterile -- so the jam going into the jars is around 105°C.
- sitharus 9y agoThat's correct, but I've seen so many recipes on the internet that let the jam cool so the jars don't crack. That's ok for making a small amount to eat quickly, but for proper preservation you really need to do it hot.
- deleted 9y ago[deleted]
- Symbiote 9y agoIt helps that my mother trained as a professional cook. That jam kept well for years. I also remember it very clearly, as jam-making was by far the most dangerous cooking we ever did together. I could probably chart my maturity based on how much I was allowed to help, starting from washing the jars and putting them in the oven to sterilize, all the way to doing the whole process while she watched.