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Technical Pen Help -- Rotring Rapidograph Vs. Isograph

technical pen rapidograph isograph rotring

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#1 bourbonyNY


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Posted 29 October 2015 - 06:50

a question for those with technical pen knowledge -- 


i remember futzing around with some old school plastic rotring technical pens when i was a kid visiting some older cousins.  i would mostly just draw/sketch/doodle with them, and it wasn't until years later when i got into fountain pens that i started reading up on rotring.  


these days, rotring remains a favorite partly because of this nostalgia, but i'm really more interested in their fountain/ballpoint/rollerballs.  i remain curious about those technical pens, though.  can someone tell me what they were originally made for?  i've read online that they are for architecture/design/technical drawings, but i think my cousins were only in high school, or maybe college.  also, what's the difference is between rapidographs and isographs?  it is simply that one uses cartridges and the other refills from ink bottles?  



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#2 OCArt



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Posted 30 October 2015 - 16:47

I can only talk about Rapidographs, they were made for doing all varieties of technical drawing.  Architecture, graphic design, lettering, etc.  My recollection is that they had to be used very often or they would clog and need to be disassembled and cleaned.  Rapidographs are piston fillers and their nib came be unscrewed and replaced with an Estie nib.


"Pens a'plenty in 2020" Chuck Montano from The Nib Section podcast

Also tagged with one or more of these keywords: technical pen, rapidograph, isograph, rotring

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