Perforated self-adhesive films are used for one-way vision graphics on windows and for privacy applications. The perforations typically have a diameter of around 1.5mm and allow through vision from inside a building or vehicle. However, dirt can accumulate in the holes which spoils and blocks the through vision effect.
The problem can be prevented by applying an unperforated overlaminate film to the perforated window film. The downside is that this adds extra cost and the see-through from inside is not as good.
The following techniques described are practical recommendations on how to clean Contra Vision® Perforated Window Films to keep them looking their best. However, we would not recommend any cleaning of Contra Vision Perforated Window Films within 24 hours of applying the window perf.
Cleaning instructions for perforated film without an overlaminate
- Mix a solution of mild soap and sufficient water to produce plenty of suds.
- Apply the solution sparingly using a lint-free cloth, trying not to saturate the holes with water which may leave a residue when dried out.
- Gently wipe the perforated film to remove dirt and grease, watching carefully that ink does not transfer to the cloth if the film is printed.
- For any areas of stubborn dirt trapped in holes, apply more solution and use a soft bristled brush to loosen the dirt.
- When satisfied that the dirt in the holes is softened, wash off the suds with plenty of clean water, again using the soft bristled brush to ensure that softened dirt is removed from the holes. Rinse completely.
- Leave the excess water to evaporate.
A Vacuum Squeegee can also be used as part of steps 4 and 5 to remove the loosened dirt and excess liquid. We recommend the Karcher WV5, or similar, which is widely available from DIY outlets.