The good news is: if you make a mistake, it can usually be fixed. Pomona’s Pectin is thermoreversible, which means that your jam or jelly can be put back in the pan, ingredients can be added, and the mixture can be re-boiled and then re-jarred and re-processed. When the jam or jelly thoroughly cools, the pectin will re-jell.
See My Jam or Jelly Didn’t Jell – Can I Fix It? for specific problems and their fixes.
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Posted in: 7. Troubleshooting