Museum of Design Zurich Archive of the Zurich University of the Arts (in German)
The other big issue with the pre-filter is that the mesh is made up of a lot of loose material
His motive for doing this remains unknown but sometimes historians ask too many questions - maybe he was just tinkering around and thought it might make a good game
Ingredients: calcium aluminum borosilicate,mica, titanium dioxide, ferric oxide, carnauba wax, magnesium stearate, kaolin, silica, isododecane, hydrogenated polyisobutene, capric/caprylic triglyceride, dimethicone May contain: carmine, ferric ferrocyanide
This is not always the easiest thing to do because they hold little power unless there is support from the owners