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 does it mean if you are the driver? A dream about driving a car may indicate how well you are in control of where you are going and if you are taking responsibility for your actions. Do you know where you are going and how to get there? If you are driving, is there anyone in the vehicle with you?