High pressure cleaning
From Wikipedia, the free encyclopedia
High Pressure Cleaning was developed as a fast effective way of removing mould, grime, dust and dirt from surfaces. In its extreme high pressure form it is used in many industrial cleaning applications requiring surface layers removed from some materials as well as dust free cutting of some metals and concrete. High pressure water at medium pressures with the aid of special chemicals aids in the removal of graffiti. This process (especially when the water is hot) is used as a quick rinser of the softened graffiti. Sometimes people use a pressurized mixture of air/sand or water/sand to blast off the surface of the vandalized area thus etching the surface making it extremely difficult for anyone to ever use high pressure cleaning as a follow up process. Sandblasting when used in graffiti removals often overcleans a surface and is capable of leaving a permanent scar on the building surface. Compare to sandblasting.
