Mechanical pencil 0 3, 0 5, 0 7, 0 9, 2 0 refill comparison, respectively, used to do the best

1.: Very fine, only HB hardness, suitable for writing and drawing details.

2.: Thin, with two hardnesses of HB and 2B, suitable for daily writing and drawing some details.

3.: Medium thickness, with two hardnesses, HB and 2B, suitable for writing and drawing some thicker lines.

4.: Coarse, with HB and 2B hardness, suitable for drawing some thick lines or occasions that need to be weighted.

5.: Very thick, only 2b hardness, suitable for drawing thick lines or occasions that need to be weighted.

To sum up, the refills of mechanical pencils have different application occasions depending on the thickness and hardness. And the refill is suitable for everyday writing and drawing some details; And the refill is suitable for drawing some thick lines or occasions that need to be weighted.

Can be used to sketch paintings.

Can write. It's a little too thin, and it's easy to fold when writing.

Personally, I think the mechanical pencil is easy to use.

The difference between a mechanical pencil and a mechanical pencil refill is that it is thinner than a mechanical pencil refill.

Because of the different thickness of the refill, the thickness and size of the writing font are also different.

Mechanical Pencil Specifications:

The hardness of the pencil refill has a clear division, from soft to hard is 6b, 5b, 4b, 3b, 2b, b, hb, h, 2h, 3h, 4h, 5h, 6h, and the ink blackness is the opposite, and the ink blackness becomes lighter from 6b to 6h.

The specifications of the mechanical pencil only determine the thickness and thickness of the refill, and the soft and hard of the mechanical pencil refill has nothing to do with the thickness.

Professional painting is divided into various hardnesses, and the specifications will be written on the refill box, 2b or 4b, etc., pay attention to careful selection when buying**.

The pencil lead is thicker than the child's writing strength, so the primary school students use it better, try not to use a very thin refill, if the refill is too thin it will be easy to break and block, which is not conducive to writing practice.

The mechanical pencil has the characteristics of no cutting, no pressing, completely automatic, easy to operate and write, and the refill replacement is also simple and worry-free, and the refill needs to be carefully stored.

There is no mechanical pencil and no one is easy to use, but the thickness of the refill is different, slightly thicker, and you can choose according to your own usage habits.

The pencil lead radius of a mechanical pencil is millimeters, and the pencil lead radius of a mechanical pencil is millimeters. In general, mechanical pencils are more suitable for drawing, because the radius of lead is thicker, and the visibility on the paper will be clearer, if you use too thin pencil leads, it is easy to make a permanent mark on the sketch paper, and it is easy to scratch the paper by layering dark colors many times. Mechanical pencils are more suitable for writing, because they are slimmer and look more neat and tidy, but because primary school students have more writing strength, and the old refills that are too thin are not conducive to their practice, so primary school students use them better.

Disadvantages of using mechanical pencils for elementary school students.

1. It is easy to have potential safety hazards.

Mechanical pencils are detachable, and elementary school students are more curious and are likely to disassemble them themselves. If a student accidentally eats a part that has been removed from a mechanical pencil, it may pose a danger to the child's health.

2. The refill is easy to break.

When many primary school students first learn to write Liang Ji characters, they generally use more force, so that the mechanical pencil lead is easy to break, resulting in poor writing. As a result, students have to use an eraser to wipe hard, which makes the homework book look not very neat.

3. It is not conducive to practicing calligraphy.

As mentioned above, primary school students who have just learned to write often "use too much force" and break with a little force, which is not conducive to practicing calligraphy. Secondly, mechanical pencils are generally made of plastic, the texture is relatively light, primary school students will inevitably shake when writing, and the control is not good, which is not good for primary school students to practice calligraphy. <>

1. The thickness of the mechanical pencil and the refill.

The refills of the refills.

2. The hardness of the mechanical pencil and the refill.

The refill of the refill is not easy to fold when used.

3. In terms of writing, the thickness of the font.

The refills of the refills.

Refers to the diameter of the refill in millimeters. Refers to the diameter of the refill in millimeters.

Generally speaking, mechanical pencils have their own models, and their refills can only be used in the corresponding specifications. That is, the mechanical pencil can only be used for the refill that is installed, and the refill cannot be installed because it is too thick. The mechanical pencil can only be used with the refill installed, and the refill is too thin, and it will slide out of the nib after the installation is lost, and it cannot be used.

Summary. The mechanical pencil is thinner than the mechanical pencil in the hardness of the refill, they belong to different specifications. Generally speaking, we usually use mechanical pencils for writing, including when filling out the answer sheet for the exam, we all require mechanical pencils, if you use other pencils, you may not be able to scan.

The mechanical pencil is more suitable for drawing, the lines will be more powerful, and it will be smoother and clearer.

The mechanical pencil is thinner than the mechanical pencil, and the hardness of the refill is not as good as the mechanical pencil, they belong to different specifications. Generally speaking, we usually use mechanical pencils for writing, including when filling out the answer sheet for the exam, we all require mechanical pencils, and if you use other pencils by hand, you may not be able to scan them. The mechanical pencil is more suitable for drawing, the lines will be more powerful, and it will be smoother and clearer.

The pencil lead is thicker than the child's writing strength, so the primary school students use it better, try not to use a very thin fiber refill, if the refill is too thin it will be easy to break, do not use the practice of the word nonsense.