Preservative how?
Grams would fill a quart jar with blackberries add hot water and give them a water bath She must have added sugar or honey but I don’t remember that
We used the blackberry juice for upset stomach
One of the recipes uses dried elderberries that need to be soaked in vodka for a 7-10 days. Then strained and squeezed with a jelly or juice strainer to create the tincture.......