Buy a package of Certo and follow the instruction in the package.
Jim
==========
>We are celebrating our first harvest of valiants, potent flavored little
>ones they are. Was very encouraging to see the beautiful grapes down at the
>Uof M during the nafex conference, but if all we can grow here up nort is
>valiants I don't think we are doing too bad.
>Recently I saw grape jam for sale , looked here at home in the Joy of
>Cooking book - and no such recipe. I am not a jelly fan, so this seems like
>a good way to go. Any clues? Thanks, Del