Drawing whith a bamboo

The bamboo brings a hazardous component : the flooding ink dries suddenly in the curve of a body to whihich the artist is paying attention. The artist maust then interupt his gesture to fuel and continue the représentation of the figure starting from another point.
This alea brings contourlines ruptures which gives to the form a porous aspect necessary at the signal of the presence of living.
What is remarkable is that in clular biology, as in representation by the drawing, the border ruptures are hazardous.
The lacking zone of the line is a virtual line.
Our brain contains neurones sensible to virtual lines : to be convinced of that fact look at the triangles of Kanisza whom no side is drawn as showed in the book The neutral Light.
The bamboo choosen is three cm in diameter.