For every 1kg of blackcurrants. no need to pick over too much as they are strained
600ml water.
Bring to boil and simmer for about 45mins. Strain into a bowl over night using scalded teatowel or appropriate method.
Put strained juice into pan,For every litre of juice use 700ml of sugar .heat gently to dissolve sugar. Remove from heat and pour into sterilised bottles leaving a 1cm gap at top. At this point you can add a couple of teaspoons of brandy. Seal. Hope this is what you wanted.