All types of self-adhesive films have a different level of adhesive strength. The structure of the adhesive varies – some bond strongly than others, depending on the case. The surface plays a big part in the adhesive strength of the film. In this case, Chris Cook applies self-adhesive film for wall application over a painted wall surface.
What do you need for the test?
You will need a sample of film, a squeegee, and a rubber brush with which to assert additional pressure. And lastly you will test adhesion strength with a fishing scale.
- sample of film
- squeegee
- rubber brush
- fishing scale
After you apply the sample with the squeegee, use the rubber brush to assert additional pressure to bond the film perfectly to the wall. The last instrument is a fishing scale, used to test the adhesive strength.
Use the fishing scale to pull the film with strength 5mm/sec. While you do that, pay attention to two things:
- the manner in which the film gets pealed, is it consistent and smooth or in a sudden releasing.
- how much strength it is needed to peel the film. Bare in mind, that the maximum strength is 200-250 gr/sec.
