The materials and procedures of the 19th-century lithographer are duplicated in almost every respect by the contemporary hand printer. An image is drawn with tusche (a carbon pigment in liquid form) and litho crayon before the printing surface is fixed, moistened, and inked in preparation for printing. The printing itself is done on a press that exerts a sliding or scraping pressure.
The dream about keys is a dream that refers to solutions to one's life problems. The question you have to ask yourself when you have this type of dream is 'what is the problem I have today that needs a solution, or a key? (read all at source)
The film then reveals who was the one actually doing the dreaming. Released in July, The Key is pitched as a fruity floral musk with notes of woods and vanilla. It is his third fragrance release in three years, following Someday in 2011 and Girlfriend in 2012. PHOTOS: Justin Bieber Through the Years. Bieber releases the short film for The Key after previously finding monumental success in the perfume world.