Classic jelly with excellent color
Wash raspberries in running water and crush them thoroughly; then simmer covered for 10 minutes.
Put the fruit in a jelly bag and extract all juice possible.
Measure 4 cups of juice. If there is less than 4 cups, add water to make this measure.
Place raspberry juice, sugar and lemon juice in a preserving kettle and cook over high heat until it boils, stirring constantly.
Immediately stir in the pectin. Then bring to a full rolling boil and boil hard for one minute, stirring constantly.
Remove from heat and skim off foam with a metal spoon.
Ladle into hot, sterilized jars and seal immediately.
Process jars according to directions