Extract the pigment.
Red cabbage.
•Chop up or grate half a red cabbage (or one small cabbage), place it into a large saucepan and fill with just enough water to cover the cabbage.
•Either let this sit in water for several hours or help speed up the process by bringing to a simmer for 20 minutes until the water is a dark purple.
•Let the cabbage water cool before straining into a potions bottle for serving.
Blueberry, cranberry, blackberry, black currant.
•Place fresh or frozen berries in a bowl, mash to break them up, then pour just a bit boiling water over them.
•Let sit for 5-10 minutes, then strain using a fine cheesecloth or tea strainer.
Create your potion.
•In a glass filled with 250mL of water, add in just enough base colour to change the colour of your water.
•Drop in several drops of pH booster drops or sprinkle a pinch of bicarbonate soda. The colour will turn to a shade of blue to green depending on the pH level.
•Next pour in your clear cordial, following the bottles measurement suggestions for a 250mL drink.
•You may, in advance, add in some additional lemon juice or stir in some citric acid to your cordial before adding, for a more vibrant result.
•Alternatively, you can have another test tube filled with lemon juice or a small potion bottle with a sprinkling of citric acid for the final result.
•Give the potion a final stir with your 'wand'. The end result will be a shade of pink to red, depending on the acidity level.