http://nchfp.uga.edu/how/can_02/apple_sliced.html

and my apples turned out like this (See photo at the bottom of the blog page)

http://beingfrugalbychoice.blogspot.com/2012/11/canned-apple-slices.html

I had about 4 (of 21) jars boil over as I was pulling them out of the canning pot and one jar that had floated up and was laying on it's side, devoid of any syrup (that one went into the fridge).

Of the 4 jars that boiled over, the syrup level is about 1" lower than what they started out with and the apples float leaving about 3/4-1 inch of syrup showing at the bottom of the jar. All jars sealed except the jar that was laying on it's side. (The apples that are at the top of the jar are above the syrup level and not submerged in the syrup)

My questions for you all are;
1) are the apples in the jars that boiled over ok?
2) I left 1/2"-3/4" head space - so what can I do in the future to prevent this.

I'll try to post a few photos in a bit.
Thanks in advance for any advise.

Your jars look very heavily packed, perhaps over-packed and that can easily cause boil over. To prevent the problem in the future, don't fill the jars so full. 1/2" headspace but use less apple slices and more syrup per jar so there is room for the apples to expand.

Did you raw pack or hot pack? Makes a big difference in how the slices respond to the processing as the instructions say "Raw packs make poor quality products" as the apples swell in the jar and force the liquid out.

Which level of syrup did you use?

It also helps to let the jars sit in the pot until all the hyper-boiling activity ceases before lifting them out. As to the jar that tipped over and floated, if you cleaned the rims well then likely the ring wasn't screwed on tight enough.

They are safe to keep and store but those above the liquid will brown so use them first. Be sure to wash the jars well before storing and especially under the bands as you remove them for storage as syrup will have packed in there.

Dave

I did not raw pack. I followed the recipe per the nchfp web site and boiled 5 minutes. I used plain water and citric acid as the recipe called for water or syrup per one's preference.

I think you are correct in the over packing and leaving them in the pot until the rolling boil stops. I noticed that as I was pulling some, that is when I saw them boiling over. A bit of patience on my part would have been better.

I have removed the rings and washed the jars well - some were pretty sticky.
Thank you again for your helpful insight! So appreciated!

Dave

If not, drain off the water and puree for applesauce. That's one way to salvage.

Carol