• Ink (cartridge) for Martial Matic Drafting Pen.
• Pigment-based R-ink that maximizes the functionality of your drawing pen.
• It contains special ingredients, even with a thin line width drawing pen to prevent clogging.
• Please close the tip tightly and insert the ink cartridge into the grip.
• Ink: Black. Capacity: 0.03 fl oz (0.9 ml) x 5 bottles.

Smooth writing drafting pen "Martial Matic" ink (cartridge) The "R-Ink" pigment-based ink contains special ingredients to maximize the functionality of Martial Matic Drafting Pen. The innovative ink has been greatly improved to clog even with fine line width drawing pens. ■■Martial Matic Drafting Pen The double cap with built-in spring seal protects the tip from air and prevents clogging caused by drying. Adjust the internal pressure to keep it at the best possible time. It also supports sudden changes in atmospheric pressure, and prevents dropping buttons and leakage. Special precision grinding of the nib and middle needle ensures smooth writing Nib can be easily replaced. Convenient for use with compass or template There are 12 kinds of wire width (6 inner ISO types), so you can change it according to your application. Please make sure the nib is not loose. Introduction to Writing: Tighten the nib and insert the ink tank (or cartridge) into the grip. Be sure to put the holder on and then shake the drawing pen up and down lightly and attach the tip to a tissue paper or something to make sure ink is on before using. Vertical Writing: Based on writing near vertical. Write with a light touch as close as possible vertically. Not only does it change the thickness and thickness of the ink even when applying strong pressure to the tip, but it also causes paper fibers to become clogged. After use: After use, wipe the ink and fiber from the pen tip with tissue paper, etc., and store the cap in a horizontal position. If you do not use it for several days, please clean thoroughly and dry it and save. Next Time Writing: Please make sure the ink is on tissue paper or other ink before using it. If you test writing without ink it may damage the nib. Re-inking: Before restoring the cartridge or ink tank into the grip, shake well until there is no remaining ink between the grip and the nib. Otherwise, the remaining ink will blow out from the side of the nib. Washing Instructions: Remove the nib key on the barrel of the holder and expose residual ink from the nib, grip and ink tank to tap water and gently shake to clean the ink until the ink runs out. In particular, keep the tip continued until the movement of the middle hand becomes lighter. Allow to dry thoroughly after washing. Moisture remaining will reduce the ink for the next use. When ink is hardened: If the ink is hardened, it is best to soak it overnight in a 1:10 % neutral detergent and water and use it with an ultrasonic cleaner. Rinse thoroughly with cleaner solution before use. *If the ink becomes very hard, it may not be able to go back to it. Product Name: Staedtler Drafting Pen Martial Matic Refill Ink Cartridge Black 745 R 00-9