Old Rotring Micronorms with rapidomat pen set - 'cleaning' and drawing
28:36
Rotring Isograph: My Fave Drawing Pen (How It Works, How To Fill It, How I Use It In Illustration)!
22:57
Can this UltraSonic Cleaner Save my Pens!?
22:46
5 Fountain Pens Better than Montblanc! Don't Waste Your Money!
18:30
Simple & Effective: The Ruling Pen is the Early Version of Drafting and Technical Pens
14:41
The Top 6 Fountain Pens I Recommend to Beginners
12:05
Rotring Rapidograph Cleaning & Unclogging
13:23
Comparing different technical pens (Rotring, Kern, Faber-Castell)
21:27