twgardner2
Well-Known Member
So I just finished my first cider and I was really excited about the sticky on pasteurizing my cider to get a slightly-sweet, carbonated final product. I followed the procedure and took plenty of safety precautions, but had a pretty harrowing experience.
I had one bottle explode (not just the cap popping off, I mean explode) in the pot while resting in the hot water. I assure you I heated the water to (just below) 190F and turned the heat off before inserting the bottles. The bottle exploded after about 7 min.
Luckily, most everything was contained in the pot, but after the first explosion, stepped up my safety precautions. I put a second pair of glasses on and I draped a small carpet over my entire body when approaching the stove - I must have looked pretty ridiculous!
The second explosion occurred, strangely enough, after I had removed the bottles from the heat and let them sit and cool. I am a nuclear engineer, so I've had plenty of training on heat stress to materials. I didn't dunk the bottles in cold water or anything. They were just sitting there and had been cooling for about 10 min. I had walked across the room and my SWMBO came around the corner. I told her one bottle had exploded in the pot and - right on queue - a bottle sitting on the counter BLOWS UP! Needless to say, she wasn't too happy.
So, I think I know why this happened. The bottles I'm referring to are Italian 1L glass water bottles. They aren't too thick and have probably been around for a while. I will no longer be bottling cider in this type of bottle. I think the larger bottle is more susceptible to thermal stress and internal pressure. Has anyone else experienced this? Am I safe to try my 12oz bottles? I've read through the sticky and some folks say they use 160F for 20 min. I think I will go that route.
Any thoughts?
I had one bottle explode (not just the cap popping off, I mean explode) in the pot while resting in the hot water. I assure you I heated the water to (just below) 190F and turned the heat off before inserting the bottles. The bottle exploded after about 7 min.
Luckily, most everything was contained in the pot, but after the first explosion, stepped up my safety precautions. I put a second pair of glasses on and I draped a small carpet over my entire body when approaching the stove - I must have looked pretty ridiculous!
The second explosion occurred, strangely enough, after I had removed the bottles from the heat and let them sit and cool. I am a nuclear engineer, so I've had plenty of training on heat stress to materials. I didn't dunk the bottles in cold water or anything. They were just sitting there and had been cooling for about 10 min. I had walked across the room and my SWMBO came around the corner. I told her one bottle had exploded in the pot and - right on queue - a bottle sitting on the counter BLOWS UP! Needless to say, she wasn't too happy.
So, I think I know why this happened. The bottles I'm referring to are Italian 1L glass water bottles. They aren't too thick and have probably been around for a while. I will no longer be bottling cider in this type of bottle. I think the larger bottle is more susceptible to thermal stress and internal pressure. Has anyone else experienced this? Am I safe to try my 12oz bottles? I've read through the sticky and some folks say they use 160F for 20 min. I think I will go that route.
Any thoughts?