The print is obtained on the metal, and the block is made in a somewhat similar manner to that of a line block.
A half-tone can be put on to a line block during its manufacture.
This is, briefly, an outline of the process of making a line block.
Since the line block is the least expensive it is taken as the unit of price; that is to say, if a line block costs 3d.
But there are cases in which a gradated tone, such as a sky, may need to be printed before the line block.