HOW TO ERASE CORRECTLY

Incorrect:

Erasing parallel to the stroke: The area becomes unclean and the erasing process is needlessly delayed!

Correct:

Erasing obliquely to the stroke: By employing this "piecemeal" erasing mode a rapid and impeccable cleaning result is achieved!

The eraser can fulfil its task only when the erasing motions are done in a way that there is a balanced proportion between the graphite-free and graphite-containing areas. The eraser must not be "oversaturated"!