1/4 c. beeswax
9 tbsp. Venice turpentine
1/4 c. lard
2 tbsp. mineral oil
1 tbsp. carbon black
3 tbsp. powdered China clay
Cardboard or fiberboard
Waxed paper or transparent plastic

Combine beexwax, turpentine, lard and mineral oil in double boiler. Heat over hot water until well blended, stirring frequently. Stir in carbon and China clay. Paint uniform coat on cardboard. Cool. Place waxed paper over surface. Write or draw with sharpened stick, fingernail or other object that will mark without tearing waxed paper. Erase marks by lifting waxed paper.