As the name itself and the technique comes from France - allows copying by friction or pressure on the plate of textile structures, as well as other rough paper.
In this process the metal plate is covered with very thin base /etching ground/, covered with a thin structured paper and on top is drawn so that the image to paste on the ground. When removing the paper remains adsorbed on it and remove the protective ground where painted. After etching and printing lines out soft and grainy, resembling chalk line. The nature of chalk or pencil stroke and grain of the paper affixed on the plate shall be reserved in print.