1, pen tip width is different.

2. Different fonts are suitable for writing.

3. The elasticity of the pen tip is different.

Pen is a widely used writing tool, which was invented at the beginning of19th century and designed by American Walt Man. The pen is made of metal, and the writing is smooth, elastic and quite smooth. On the mouth of the pen cap or the surface of the pen tip, there are obvious trademark numbers and models. It is divided into dip pen, fountain pen and ink bag pen. Pay attention to maintenance and cleaning when using.

There are many kinds and models of pens. According to the composition of the nib, it can be divided into gold pen and iridium pen.

According to the requirements of our national standards, the parameters of the pen mainly include the following aspects:

1, the pen tip is slippery.

2. Water leakage resistance.

3. Continuous writing time.

4. Intermittent writing time.

5. The pen was clamped hard.

6. Corrosion resistance.

7. Handwriting width.

8. Water absorption.

Maintenance of pen

1. Protect the gold (platinum) coating on the surface of metal parts, prevent hard metal parts from rubbing and colliding with each other, avoid contact with acidic and alkaline solutions, and often wipe with a soft cloth to keep the pen body fresh.

2. The water absorber has a structure of two ink bags. Please give priority to using ink bags to keep the water flowing smoothly.

3. When using water absorbent, please use non-precipitation ink. Before calling the ink or stopping the storage, wash the interior with clear water according to the ink absorption method, and store or call the ink in rotation.

4. Please don't use black ink containing colloid, so as to avoid clogging the writing structure and affecting the water.

5. Plastic parts should not be exposed to high temperature (65°C) and organic solvents such as alcohol.

6, writing structure should not be removed, in order to avoid parts lost or damaged.