1-100Pcs Waterproof Oil-based Marker Pen Quick Dry Black Blue Red Ink

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Important Warning for Marker Storage
Permanent Marker Pen Notice

Important Usage & Storage Notes

1.Cover the cap tightly immediately after use

The oil-based ink will evaporate quickly when exposed to air. Leaving the marker uncapped for a long time will cause the nib to dry out completely and the pen to stop writing.

2.Seal well during transportation & storage

Always ensure the cap is fully locked before packing or storing. Loose caps during shipping lead to ink drying and product failure.

3.Proper storage environment

Store markers in a cool, dry place, avoid direct sunlight and high-temperature environments, which accelerate ink volatilization.

4.How to restore slightly dry nibs

If the pen is only left uncovered for a short time: Tighten the cap, place it upside down with the nib facing down for 1–2 hours, then test writing. If the nib is fully dried out from long-term uncovered exposure, the pen cannot be recovered.

5.Tips for long-term use

Do not remove the cap for more than 5 minutes during writing. For intermittent labeling work, cap the pen in time after each use.