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How to distinguish between gel pen, signature pen and ballpoint pen

There are a lot of writing pens on the market, and now some school exams have certain requirements for which pens to use. Lepusheng Stationery recommends that students or parents should know the pens...

The difference between gel pen, oil pen and water pen

The water-based pen uses ink as pure water, and the paper absorbs it strongly. Water-based pens are generally used on the absorbing surface. Even if they are applied to a non-absorbent surface, they...