Bring blackberries and water to a boil in a astronomical pot till blackberries are softened, about Quarter-hour. Resolve on a ways flung from warmth and mash berries the exercise of a potato masher.
Line a sieve with cheese cloth; place over a astronomical pot. Pour mashed berries thru cheese cloth-line sieve; let take a seat till all liquid has drained thru cheese cloth, about half-hour. Shuffle 1 pound sugar per 1/2 gallon of drained blackberry juice.
Bring blackberry juice and sugar to a boil in a pot; cook dinner till sugar is dissolved, about 5 minutes. Float off any residue gathered on high.
Sterilize jars and lids in boiling water for now no longer now no longer as much as 5 minutes. Pack hot saft into the contemporary, sterilized jars, filling the jars to interior 1/4 walk of the tip. Trudge a knife or a thin spatula around the insides of the jars after they’ve been filled to take any air bubbles. Wipe the perimeters of the jars with a moist paper towel to take any food residue. Top with lids, and screw on rings. Store in fridge.
You have to to presumably well continuously add more sugar, but never capture it again out. It’s a ways greater to create saft with less sugar, and add more later, if it’s miles now no longer in truth sweet ample.