Jentner cold gold plating chemical bath JE4xx - Deposition of gold at room temperature - Low reparation and attendance costs as no radiator, thermostat and recirculation is needed Flyer: Cold Gold Plating Bath
http://www.jentner.de/tl_files/core/images/chemie/JE4xx_0112_E.pdf
(text source: homepage van www.jentner.de)