You must not add any sugar yet, just a little very little of water.
Then you have to stir constantly.
Raspberries and red currants in two separate pans,
but the procedure is the same.
They must not boil or cook.
They have just to get a little warm and softer.
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This photo is not isolated,
but part of a thematic gallery
showing how to make jelly with a little help from my friends....

If you feel like,
to see all the other related pictures.