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TOP > Frequently Asked Questions > Usage Precautions/Solutions

Why is there a small lump inside my Copic Ink bottle?

This happens especially with colors whose ink has a high dye concentration. The dye may harden due to temperature drop. If you find a lump, warm up the bottle with lukewarm water (about 50 degree Celcius or 122 degree Fahrenheit) to dissolve it. Please be careful not to bring it close to fire.