[Qiviut]

I remember (as a kid) paraffin wax on top of some jelly in jars! My aunt used to do that - probably learned it from my granny, but I don’t know for sure.

[greeneyes]

Yep. I was too young to remember all the details. But the jelly was wild grape/wild blackberries. A few of the unripe ones was the pectin.