How to Use and Clean Koh I Noor Rapidograph pens

When it comes to getting a fine line, certain pens are better than others. Sakura micron pens are great but they don't last very long. Technical drafting pens are refillible and can get the thinnest line possible. Though CAD has mostly replaced these pens for drafting, they still have a place in the art world. But there are importants things about these pens I wish I had known before using them. I use the brand Koh I Noor, but there are other brands such as the Staedtler Marsmatic. In the picture, to the left is the ink reservoir, mine has ink in it so it is not clear. The yellow band has the threads that twist it into the the pen. Do not disassemble the pen except for the reservoir, as it can lead the pen to leak. Shaking the pen also leads to leaks.

• If you drop it, then pens will break and be useless. These pens write with a thin filimant wire, if it breaks off/ gets bent the pen will know longer write.
• The smaller the tip of the pen, the easier it will break. DO NOT use the small ones on textured paper, for instance, watercolor paper. Lint from the paper will get into the tip and break it.
• make sure you have pen cleaner such as rapidoease. Dip the pen tip in between drawing sessions to prevent it from clogging. And completely clean with it when you are done using the pens for awhile.
• If the pens have dried ink, submerge  them in the solution. Then rinse with water. For really clogged pens fill the ink reservoir with the cleaning solution and let it sit so it can clean out the pen from the inside. 
• Koh i noor make a special bulb for cleaning but I have not purchased one, as they are expensive. 

Here's a piece of mine done using these pens. Feel free to ask any questions about these pens ^_^

 Alvin 3165SP4 Rapidograph 4-pen Tech Pen Set (Google Affiliate Ad)

One can purchase these pens from the above link, ebay, or online art stores. Some physical art stores sell these pens, but look online first to make sure they are selling them for a fair price.