Unfold a cocktail napkin halfway. Fold bottom right corner up and just to the left of center. Fold left side over right. Fold in half. Cut a half circle on short side of triangle. Repeat with two more napkins.
Dip pointed or rounded ends of triangles in a little bit of ink or equal parts bleach and water or food coloring and water for a few seconds. Unfold and air-dry.
Cut a stem from a coat hanger, or use a straw or chopstick. Stack napkins so rounded edges face out, and gather into a blossom. Use floral wire or zip ties to attach to stem.