Gather plant materials. Rinse well and dry.
Place about 1 cup of plant material in a pot. Stick to leaves or petals not stems.
Cover with 2 cups of water.
Add 1/2 teaspoon of alum and stir.
Bring to a boil then turn the heat to low and simmer for 20 minutes.
Cut a piece of watercolor paper and dip it into the water to see the color.
Continue to simmer the plants for a longer period and test again if desired.
Remove from heat and allow the mixture to cool.
Strain the ink from the plant material by attaching a coffee filter or cheesecloth to the top of a jar with a rubber band.
Pour some of the watercolor paint into small bowls.
Add some baking soda about 1/2 teaspoon to one bowl and 1/2 teaspoon or more of lemon juice to the other and see how the color changes.
Add one whole clove to the bottle you will keep the paint in as a preservatie.
Use a funnel to pour the results into the bottles.
Add several drops of gum arabic as a binder to thicken the ink.
Place a cap on each bottle and label them with paper and tape.