Here are the primary methods for indurating (hardening) paper:
"Indurated paper" refers to paper that has been treated, hardened, or made rigid, often for use in crafting, modeling, or to simulate stronger materials like wood or stone . indurate
Soaking paper in a mixture of powdered sugar and water, then allowing it to air-dry, makes the paper rigid, which is popular for origami. Here are the primary methods for indurating (hardening)
For extreme hardening, particularly with papercraft or Pepakura models, coating with fiberglass resin is a common technique. or made rigid
Applying a thin, transparent layer of silicone gel to paper increases its strength. Sprays: Clear sprays, such as polyurethane or , can be used to stiffen paper models.
Let me know your project, and I can suggest a specific technique.