Liquid K2, a form of synthetic cannabis that causes erratic conduct when smoked, is currently being smuggled to inmates through the mail, sprayed on letters and web pages of textbooks. This way of K2 is way more difficult to detect than regular leafy K2 items that look more like cannabis. https://www.tumblr.com/factsabouteverythingseo/748651429729812480/strongest-k2-spray-on-paper-strongest-k2-spray?source=share