Method for producing a wall heating system, a heating wallpaper and heating ink mixture and an inkjet printer with a heating ink

A method for producing a wall heating system, comprising:

• determining a printed image of heating surfaces on a heating wallpaper;
• gluing the heating wallpaper to a wall;
• and
• connecting the heating wallpaper to an electrical voltage,
• wherein:
• the printed image is supplied to a control system of an inkjet printer,
• the control system is configured to control at least one printhead,
• at least one container connected to the printhead in an ink-conducting manner is filled with heating ink, and
• the heating ink is printed along the heating surfaces of the heating wallpaper.

A liquid heating ink mixture comprising:

• 0.02% w/w-0.5% w/w anti-foaming agent,
• 0.05% w/w-90% w/w carbon,
• 0.05% w/w-40% w/w binder,
• 40% w/w-80% w/w water, and
• 0.05% w/w-15% w/w carbon nanotetrapods.