Host Mann-Steinberg has ever produced the "Federfarbe" (pen ink), but it seems that this is no longer made. This may have to do with the acquisition of Hostmann-Steinberg by Huber.
Hostmann-Steinberg makes colors in the Pantone color system. The "process" colors Cyan, Magenta and Yellow are not the Pantone system. Therefore Hostmann-Steinberg supplies these colors as "Rapida Cyan", "Magenta Rapida" and "Rapida Yellow".