Place wood plaques flat sides together, making sure all sides are flush. Hold the 2 plaques together using bar clamps on all 4 sides.
Drill holes in 4 corners.
Run carriage bolts through each hole. Secure the 2 plaques together with first a washer and then a wing nut.
Cut cardboard and fold thin paper (tissue or newsprint) to fit within the four bolt.s
Layer cardboard, tissue, flowers, tissue and cardboard inside of the press.
Place the top wood piece, pretty side up, onto the layered flowers, running the bolts through the holes. Secure with washers then wing nuts until finger tight. Place in a dark, dry place replacing the tissue paper as needed and tightening the nuts every few days until flowers are fully dry.