Testing acids vs. bases using cabage juice

From The Mystery of the Periodic Table page 40

Red = acid
Green = base


Vinegar = Red
Vinegar with baking soda = Purple (wich turned green after sitting out all night)
Orange juice = Pink (that looked like grape fruit juice)
Lemon juice = Pink
7up = Pink
Milk = Purple
Soy sauce = no change
Oil = no change
Baking soda in water = no change
Corn syrup = no change
Soft soap = lighter green
tums in water = lighter green
Molasses = no change
Sugar water = no change
Mustard = Red
Mayonaise = Purple
Ketchup = no change
Melted Butter = Purple
Pickle relish = Maroon
Ranch dressing = Purple
Rasberry jam = Purple
Salsa = Purplish Red