How do you make a paper poster waterproof?

To make a paper poster waterproof, you can apply a fixative spray. This method provides a clear, protective layer.

Waterproofing Paper Posters: Using Fixative Spray

Fixative spray is a versatile solution for waterproofing printed materials, including paper posters. Here's how it works:

• Application: The spray is applied directly to the poster.
• Protection: It forms a transparent protective layer.
• Drying: Once dry, the layer makes the poster waterproof and durable.
• Handling: The treated poster can be handled without damaging the print.

Steps to Waterproof a Poster with Fixative Spray:

1. Prepare the poster: Lay the poster flat on a protected surface.
2. Shake the spray can: Ensure the fixative is well mixed.
3. Apply the spray: Hold the can about 10-12 inches away from the poster and apply in even, sweeping motions.
4. Allow to dry: Let the fixative dry completely before touching or moving the poster. Follow the drying time recommendation on the spray can.
5. Repeat for better protection: Apply multiple thin coats, allowing each to dry before the next, for better waterproofing.

Additional Tips:

• Ventilation: Always apply fixative spray in a well-ventilated area.
• Test in an inconspicuous area: Test the spray on a small, hidden section of the poster first to make sure there are no adverse reactions with the ink.
• Read the instructions: Always follow the manufacturer’s instructions on the spray can.

By using fixative spray, your paper posters will be more resilient against water and moisture.