1 1/2 c. laundry starch
Cold water
1 qt. boiling water
1/2 c. talcum
1 1/2 c. soap flakes
Poster paint

Mix laundry starch with a little cold water to form a creamy paste. Add boiling water, cook until mixture becomes transparent. Add talcum (optional) for a smoother paint. Let mixture cool a bit. Stir in soap flakes. Let cool. Store in screw top jars. Add poster paint as needed.