Street Chalk
1 cup plaster of paris
½ cup cool water
2-3 tablespoons of BIO COLOR
· Mix 1/3 cup of the cool water with the BIO COLOR
· Pour plaster into a disposable container
· Using a disposable stirring stick, pour BIO COLOR/water mixture into plaster
· Stir well, especially at the bottom of the container (Colors will darken as they dry.)
· Add just enough water to wet all of the plaster
· Stir well and pour into molds
Suggested molds: 3 oz/5 oz dixie cups
Novelty ice cube trays
Chalk will set in about 30-40 minutes. Then release from molds and let stand for 24 hours. (Leave chalk in dixie cups to cure.)
Sidewalk Chalk
2 Cups Water; 2 Cups Plaster of Paris; 2 Tbsp. Tempera paint ; Toilet paper tubes with duct tape over one end
Combine and stir together. Let stand a few minutes. Place tubes on cookie sheet lined with foil or wax paper. Pour mixture into holders and let stand until semi-firm. Remove holders and let dry completely. Ready to use in 1 to 1 1/2 hrs. (Reminder, never pour plaster down sink).
Eggshell Chalk
4-5 Eggshells; 1 tsp. Flour; 1 tsp. very hot tap Water; Food coloring, optional
Wash & dry eggshells. Put into bowl and grind into a powder. A mortar and pestle works fine for this.
Discard any large pieces. Place flour and hot water in another bowl and add 1-tablespoon eggshell powder & mix until a paste forms. Add food coloring if desired. Shape & press mixture firmly into the shape of a chalk stick. Roll up tightly in a strip of paper towel. Allow drying approximately 3 days until hard. Remove paper towel & you’ve got chalk! Eggshell chalk is for sidewalks only.
