Pens and the Art of Rapidograph Maintenance

I feel the need to discuss my relationship with my pens, since they have been a big part of my life lately.  There are a few different types of pens around for illustrators.  There's the old fashioned crow quill, the felt-tipped Micron(r), and then there's the Koh-I-Noor Rapidograph(r). I recently upgraded to a full, 7-size…

Remarkably versatile, Koh-I-Noors Rapidograph Technical Pens handle like a pencil, moving in all directions without snagging or digging into the

Koh-I-Noor Rapidograph Pens - Set of 7

Koh-I-Noor Rapido Sketch Technical Pen Art Set, 0.25 mm, Black Ink (77270)

Pens and the Art of Rapidograph Maintenance

Cleaning Rapidograph Pens : 7 Steps (with Pictures) - Instructables

Technical Pens

A Case For Pencils. — Michael Maslin Ruminates on Rapidographs.

Vintage Koh-I-Noor Rapidograph - Repair Q&A - The Fountain Pen Network

Vintage Rapidograph Pen, Size 0 .35, 3165, New in Package

Does anyone know how this pen works? : r/fountainpens