Board had been previously prepared with applying acrylic substrate, perfectly levelled and glazzed.
At first, drawing is done with pencil. Drawing can be copied from another icon or you can draw it approximately, looking at some other icons.
After that, drawing which is done with pencil, should be enhanced by a dark color, in this case using a black acrylic color. The drawing is need to be done with pointed brush that has the ability to return to its original position after the move. This brush is capable to achieve a move (line) which has very thin ends (pointed ends). Middle of this line is thicker, with gradual transition from thicker middle to thiner ends.
This move is called "thin-thick-thin" and it takes a lot of time for exercizing. The thickness of the line depends on the strength of brush pressure. First, it is necessary to pull the line slowly, and the pressure gradually boost until the full width of the line. After reaching the full width of line, you can slowly reduce the pressure on the brush and you will get pointed end. Of course, everything should be done continuously.