Ключевые слова: abstract, acid, artistic, background, bio, biohazard, biological, biology, black, burial, caution, chemical, chemistry, dangerous, decay, design, dirty, drawing, emblem, garbage, golden, graphic, hazard, icon, illustration, industrial, laboratory, logo, organic, paint, peeling, print, retro, rough, science, scientific, sign, square, symbol, technology, toxic, triple, vintage, virus, wall, warning, waste, weathered,