Rub evenly with small roller or back of spoon. Peel off paper carefully. Picture will appear in reverse on white paper. Stir in cornstarch gradually. Store tightly covered.
Ink is blue-black.
Let dry completely. Wipe off with soft cloth. Spoon into plastic sandwich bags or jars. Mix salt, water, bluing and ammonia in a large bowl. Put charcoal in an old glass bowl.