To avoid mistakes or disappointments, ... fruit contains more pectin (the substance which causes jelly ... the pantry with no refrigeration. Strong light and heat ... juice with the sugar.
Examine tops of jelly glasses to see that there are no nicks or cracks. Wash glasses ... minutes. Stir in pectin; heat to rolling boil, ... top. Cover hot preserves immediately with 1/8-inch layer of ... 3 (8 ounce) glasses.