Lithography

Lithography,the technique of printing a flat in which image the figure for the blueprint in stone lithography. Also offprint madethis technique.

The principle of lithography is based on the properties of water and fat: theentire stone after drawing (oil paint, special pencil or ink) are exposed tothe weak nitric acid, which is canoeing down the greasy surface secures place notoutlined before adhesion of the ink.

Then, after washing with water the surface of the stone gums (diluted gumarabic acts as a fixative), after drying, all washed in turpentine and water,and finally applied to ink, which adheres to the stone only in places where thedrawing was made, and performs a print.