1. Not waterproof: the ink formula of quick-drying refill is not completely waterproof, so it cannot be completely waterproof.
2. Hot stamping paper: there will be stains when writing with quick-drying pen, which requires higher paper.
3. The color is not correct enough: the color of quick-drying pens is generally lighter and not as bright as other kinds of pens.
4. Higher price: Compared with traditional pens, the price of quick-drying pens will be higher.
5. Small refill capacity: Compared with traditional pens, quick-drying pens have small refill capacity and need to be replaced frequently.
6. High hardness of the refill: the refill of the quick-drying pen has high hardness and is easy to damage the paper.
7. The ink formula of quick-drying pen needs to be balanced: when making quick-drying refills, various manufacturers need to balance the indexes of ink to achieve the best use effect.
To sum up, the shortcomings of quick-drying refills are waterproof, paper wrapped, wrong color, high price, small refill capacity, high refill hardness and balanced ink formula.