● Ink - Pigmented carbon ink
● Capacity - 60ml
● Box size - 39.5mm× 56mm× 63mm
● Weight - 178g
#1 4214001
※When cleaning the pen nib after using Chou Kuro ink, use purified water available at pharmacies, etc. Avoid washing it with tap w ater as it reacts with minerals contained in the water and makes it diffi cult to remove the stains.

We have listed the commonly asked questions with answers to allow our customers use “Chou Kuro” ink with peace of mind.

Q1. Can anything other than purified water be used for cleaning “Chou Kuro” ink?
A. Washing the ink with anything other than purified water is strictly prohibited as it will cause the ink to adhere to the minerals making it hard to remove.

Q2.　What precautions should be taken when switching from general dye ink or pigment ink to “Chou Kuro” ink?
A. Before switching to “Chou Kuro” ink, use an eyedropper (or a converter) and rinse well with purified water until it runs clear.

Q3. What precautions should be taken when switching from general ink to “Chou Kuro” ink?
A. Before switching to “Chou Kuro” ink, use an eyedropper (or a converter) and rinse well with purified water until it runs clear.

Q4. Can I use Platinum Pen’s fountain pen ink cleaner kit?
A. Avoid washing the ink with ink cleaner to prevent the ink from adhering to the nib. Please make sure to use purified water.

Q5. What precautions should be taken when sucking the ink from the bottle using a converter?　
A. Insert the converter into the pen, submerge the entire nib into the ink bottle and draw ink into the pen. If there is any tap water left in the converter, use an eyedropper and rinse it with purified water.

Q6.　What should I do if there is tap water left in the converter?
A. Flush it out using purified water before using the converter.

Q7. Can “Chou Kuro” ink be used with all Platinum Pen’s fountain pens?
A. The ink is not compatible with inhalation type fountain pens launched in the past.

Q8.　Can the ink be mixed with other inks?　
A. No. Please do not mix with other inks.

Q9. What is the recommended storage environment?　
A. Close the lid tightly and store at room temperature and in a cool, dark place away from direct sunlight.

Q10. Can the purified water be used repeatedly?
A. Please dispose of the water once it is used for washing.

Q11.　Where can I purchase purified water?
A. Purified water is available at pharmacies, etc.

Q12. What precautions should be taken when transferring purified water to another container?
A. If there is anything other than purified water left on the container, wipe it off well and rinse it with purified water before use.

Q13. Can I switch to “Chou Kuro” ink from classic inks like blue black ink?　
A. We do not recommend switching the ink from classic inks as they contain iron components, which may not be completely removed even after washing.

Q14. Is “Chou Kuro” a pigment ink?
A. Yes, it is a pigment ink. Before use, tighten the lid and shake the bottle several times.