Although balsamic vinegar complements many kinds of food, it can leave dark, syrupy tannin stains on white dress shirts. Balsamic vinegar stains quickly permeate shirt fabrics, becoming more embedded over time. Since it visually mars white dress shirts, remove the syrupy stain before it sets and becomes insoluble.
Blot excess balsamic vinegar off the white dress shirt using white paper towels. Remove as much syrupy gunk as possible.
Rinse the remaining balsamic vinegar stain under cool water. Flush out as much residue as possible.
Pour 1 tbsp. of distilled vinegar and 1/2 tsp. of dish soap into a pail. Fill the pail with 1 qt. of warm water, and then mix the vinegar, dish soap and water with a spoon.
Submerge the stained dress shirt in the solution. Soak the shirt for 15 minutes to dissolve the balsamic vinegar.
Remove the dress shirt from the solution, and rinse the shirt thoroughly under cool water.
Launder the white shirt with 2 oz. of chlorine bleach. Refer to the shirt's laundry label for water temperature specifications.
Lay the dress shirt flat to air-dry.