Seal and envelope gum

Ingredients:
6 tablespoons pure white vinegar
4 (1 ounce) packets unflavored gelatin
1 tablespoon lemon extract

In a small pan, bring vinegar to a boil. Add the gelatin and stir until completely dissolved.  Add the lemon extract and stir until well blended.

Spread the gum thinly on the back of a label or an envelope.  Let dry.  Moisten to apply.

Store in a covered jar.  If the gum hardens, soften in a pan of warm water.