25. This is the moment to add to each jar a little lemon juice without pips. Watch for the pips!
26. The lemon juice is necessary for preservation. One coffee-spoonful per half-litre jar is enough.
27. We also add some hot pulp to fill up the jar. The jar must not be filled right to the top! Leave about one centimetre of air underneath the lid.
28. Be sure to screw the lid on tightly.