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)
If you are driving a stolen bus in your dream, then it means that you are taking drastic measures to get control of your destiny. You are refusing to go along with the system. To dream that you are in a bus accident suggests that it is time for you to move away from a group setting and venture out on your own. You need to be more independent. To dream that a bus is driven into water refers to an emotional journey that involves several people.