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)
What do dreams about your ex mean? Dreaming about an ex can mean many things depending on when the dream occurs and what happens during the dream, Mead says. For example, if you're entering into a relationship with a new person, your psyche may still be trying to sort out the pluses and minuses of your old relationship.