For a newspaper to be “printed,” the mechanical work of producing it, that is the work of typesetting and impressing type on paper, shall have been performed during the whole of the one year period.

If a monthly average of at least 50 per cent of the work of typesetting and a monthly average of at least 50 per cent of the work of impressing type on paper is done in accordance with the other provisions of this article, the requirements embodied in “printed” are met.