Ключевые слова: abstract, art, background, black, blank, board, border, business, cardboard, carton, corrugated, cover, design, detail, education, empty, feature, flute, future, grey, layer, line, material, object, office, paper, pattern, plastic, present, presentation, recycle, retro, rough, school, sheet, slide, study, surface, texture, vintage, wallpaper, white,