Graffiti-Resistant Coatings:Methods of Test and Preliminary Selection Criteria.

摘要

The 'graffiti problem,'removal of common markings from building materials,exists in public,private,commercial and industrial buildings. Substantial savings could be made by the Department of Housing and Urban Development (HUD) if the exposed surfaces in public housing resisted defacement by graffiti. Therefore,HUD initiated a program to identify and evaluate coatings which resist defacement by marking devices. From preliminary test of 48commercially-available coatings, 19were selected for more detailed tests. The 19coatings were evaluated for ability to release common markings and to resist ultraviolet radiation,high humidity,condensing moisture,abrasion and graffiti removers. The flexibility and water vapor permeance of the coatings were also determined. The substrates used were clay brick and a matte tile. Seven of the coatings were highly resistant to defacement by spray paint,and five were highly resistant to felt-tip pen,crayon and lipstick.