Method for peeling off dirt from wall surface by using peelable polymer membrane.

摘要

Pasty solution 5 of polymer 2 in solvent 4 is applied to wall surface 1 in the form of thin membrane 6, and dirt substance 3 on the wall surface 1 is caused to adhere to the thin membrane 6. The solvent 4 of the thin membrane 6 is allowed to evaporate gradually so as to turn the thin membrane 6 into dry membrane 7. As the content of solvent 4 decreases due to its evaporation, the dry membrane 7 tends to warp out of the wall surface 1 while carrying the dirt substance 3 adhering thereto, and the dry membrane 7 peels off from the wall surface 1. Thus, the dirt substance 3 is peeled off from the wall surface 1.