If ink is not completely dry, the color of it may fall. Not available to use it on blackboard for chalk. The color of it may fall by strong rubbing and rainy momentum. It may be hard to erase it depending on type of blackboard.
Dimension (Shaft Diameter Φ × Thickness × Full Length) (mm)
Line Width (mm)
1.8 to 2.5
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Although it fills the black board which is on the wall, it is faint quickly, even if the core is pressed against the black board, the ink does not come out because it is sideways. I wish for the development of more user-friendly products.
Fill in water resistant blackboard for civil engineering work
On 2015-06-04 18:33:56
Because it erases frequently, it is sometimes inconvenient for it to be difficult to erase without water. However, it is very good if you use it for characters that you do not want to disappear. If you do not forget water and towel, you can use it enough for waterproof blackboard for construction. The price is reasonable, I think that it is a good product because the pen tip will not be crushed.