Ключевые слова: abstract, aged, background, billboard, blackboard, blank, blue, board, brush, business, chalk, classroom, cover, dirt, empty, erase, eraser, film, frame, grunge, illustration, many, mess, metal, object, paper, plane, repasser, retro, school, scrape, scratch, scratched, scratches, shabby, study, studying, surface, table, texture, unpolished, used, vector, vintage, wall,