Ink and thread on paper

Take a thin thread, and dip it in black ink – let it drip off
Then, place it as desired on a sheet of paper – do not hesitate too long
Then, a second sheet of paper should be placed on top of the first one – press the two sheets together
The thread should now be pulled through between the two papers – exert pressure
Lift the top sheet off and carefully follow the new lines – then repeat the process