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)
Thatâs because dreams are images or sequences of images created by our subconscious, most of them based on our experiences and opinions towards something. That basically means that if you like a certain thing, you may dream about it, because you like it. Thereâs nothing wrong to that dream, or to that something you like, itâs just your brain creating a dream based on your feelings/perceptions towards that something.