The reason for the cut of the corner of the sleeve

It is to prevent the corner of the Plastic Eraser body from bite to the sleeve even if the Plastic Eraser is pushed out by a considerable strong force and the character is erased. We call the processi...

https://www.tombow.com/en/mamechishiki/e85/

History of Japan Plastic Eraser

It is said that the first Japan made Plastic Eraser was born in Meiji 26. The quality was not very good, and the Plastic Eraser for the drafting was relied on the import. Showa 3 (1927) for drafting P...

https://www.tombow.com/en/mamechishiki/e81/

History of solid glues

At first, it was thought that the thing of the crayon type which came out tackiness when rubbing like the slip wax of the belt of the factory. The origin of the current solid glues using Pyrrolidone i...

https://www.tombow.com/en/mamechishiki/g82/

Japan glues History

It is said that the paper has been introduced to our country in 610 years (18 years old), and the clip of paper has begun to spread to the private sector since the Heian period, and it is estimated fr...

https://www.tombow.com/en/mamechishiki/g79/

Is the non-dust Plastic Eraser not erased?

It is often thought that it eraser dust is an eraser that is not Plastic Eraser erased from the name of non-dust, but in fact it does not mean that the eraser dust does not come out. Because the erase...

https://www.tombow.com/en/mamechishiki/e76/

What is acid-free?

Acid is acids that do not contain acidic components. However, in a Tombow Pencil , the meaning of acid-free is not "acids or alkalis, nor does it tarnish paper or letters!" 」 The "Acid-free mark" is...

https://www.tombow.com/en/mamechishiki/g73/

Why is glue glued?

Since the solid glues is originally a gel product with 50% or more liquid content, it can be liquefied locally by the physical force at the time of coating and wet the paper. In this way, it is said t...

https://www.tombow.com/en/mamechishiki/g72/

Why the glues ?

glues is bonded to paper by chemical action and mechanical action, and glues itself becomes a hardened and sturdy film, and paper and paper are combined. The chemical action is the hydroxyl group (-OH...

https://www.tombow.com/en/mamechishiki/g71/

Can you erase the character of a ballpoint pen ?

These days I often see an Plastic Eraser that can erase the ink of a ballpoint pen like a pencil. This is how it is erased on earth, and the ink of the ballpoint pen is scraped off the paper. Therefor...

https://www.tombow.com/en/mamechishiki/e70/

How to erase characters with Plastic Eraser

It is a state written in the paper of "character" and "picture" that the powder of the pencil made of graphite enters the eyes of the paper. The powder is immediately peeled off from the paper when pu...

https://www.tombow.com/en/mamechishiki/e68/

History of Mechanical Pencil

It is said that the key run of the United States was announced by the name of "Eversharp" almost 100 years ago. The first domestically produced by Hayakawa Metal (current Sharp Co., Ltd.) was release...

https://www.tombow.com/en/mamechishiki/s67/

Why does the knock sound ?

In short, the ring in the inside is flipped, and the sound which knocks against the back wall becomes it. Therefore, the tick sound does not relate to a basic performance. The metal chuck sounds bette...

https://www.tombow.com/en/mamechishiki/s64/

Length and thickness of the Spare Leads

The thickness of the core is determined by JIS. The recommended value is also shown for the length. There seems to be a lot of 60mm length....

https://www.tombow.com/en/mamechishiki/s63/

About the color Spare Leads

There are two kinds of color Spare Leads . The same as colored pencils, a non-calcined core made by extrusion molding of pigments, waxes and resins, and boron, talc, mica, and clay minerals are formed...

https://www.tombow.com/en/mamechishiki/s58/

How to make a Spare Leads

The Spare Leads is made through the process of mixing → kneading → extrusion molding → firing → immersion oil → cutting → packaging. It is kneaded by a roll to increase the affinity of the graphite an...

https://www.tombow.com/en/mamechishiki/s56/

Ink Life

■ Oily ink In JIS, it is possible to write out well even after 15 months from the date of manufacture. The product of the Tombow is guaranteed 24 months. Because there is a lot sign in the wick, it b...

https://www.tombow.com/en/mamechishiki/m51/

Ink raw Materials

■ Oily ink Dye + solvent + resin is a basic configuration. This is almost the same as the composition of the marker, but the viscosity is different (viscosity of starch syrup and honey position). ■ ...

https://www.tombow.com/en/mamechishiki/m50/

History of water-based ballpoint pen

The history of the water-based ballpoint pen was branched from the oily ballpoint pen , and it was started in 1964 by auto company. After that, the improvement was made, and it was released from the d...

https://www.tombow.com/en/mamechishiki/b48/

History of oily ballpoint pen

Development as a practical thing is the beginning to have been conceived in Hungary in 1943. In fact, the history of ballpoint pen is only sixty years. In 1944 the following year, the Eversharp Compan...

https://www.tombow.com/en/mamechishiki/b47/

How to fit the ball

It is a very small ball, and it is very strange why it is turning well without falling below. To make a chip, a thin wire-shaped metal is cut in a cylindrical shape, the end is truncated to a conical ...

https://www.tombow.com/en/mamechishiki/b44/

The life of the written character

Oil is said to have more than 50 years when it is a normal storage state as a document. At present, it has been more than 50 years after the release of ballpoint pen , but the documents of those days ...

https://www.tombow.com/en/mamechishiki/b42/

Water resistance of water-based ink

It is possible to have some degree of water resistance even if it is aqueous, though not as oily. The secret lies in the pigment, and it can be said that the pigment is more water resistant than the ...

https://www.tombow.com/en/mamechishiki/m40/

The ink of one of the twin tip disappears first.

For a batting twin, a thin core may not be able to be written first, regardless of which nib you are using. This is because the capillary power of the two nib is different, the ink in the batting is ...

https://www.tombow.com/en/mamechishiki/m37/

Why fluorescent ink looks fluorescent

As can be seen from being a highlighter when expressed in English, it is possible to show the color more vividly by converting the light by sunlight and illumination to the wavelength of a certain lig...

https://www.tombow.com/en/mamechishiki/m35/

The difference between a marker and a sign pen

There is no definite definition, but generally it is called a marker, the thing with the direction of the line width of 1mm or less and the one with the direction with a line width of more than 1mm is...

https://www.tombow.com/en/mamechishiki/%e3%83%9e%e3%83%bc%e3%82%ab%e3%83%bc%e3%81%a8%e3%82%b5%e3%82%a4%e3%83%b3%e3%83%9a%e3%83%b3%e3%81%ae%e9%81%95%e3%81%84%e3%81%af/

The marking pen is a Writing of the pressure “zero”

Unlike ballpoint pen and the like, the marking uses a capillary phenomenon, and the pen tip is also responsible for its function, so you hardly need pressure when writing. Because the core is relative...

https://www.tombow.com/en/mamechishiki/m32/

Writing distance

The writing distance varies depending on the type, but it is said that the longest writing is about 1000m in a fine pen and about 100 to 150 m of the highlighter when becoming short. The pen tip and t...

https://www.tombow.com/en/mamechishiki/%e7%ad%86%e8%a8%98%e8%b7%9d%e9%9b%a2/

About liquid-type ink Induction

The liquid type is often thought that the ink is only coming out as it is unlike the batting type, but the relay core is still necessary. The ink stored in the bellows is guided sequentially to the co...

https://www.tombow.com/en/mamechishiki/m30/

Why pencils are used in elementary schools

In the Ministry of Education, we are promoting the transcription of hard general writing to 3 from small to medium, so that we can "write Japanese easily, clearly and efficiently." In order to do this...

https://www.tombow.com/en/mamechishiki/p26/

How far is the pencil written?

The writing distance that can be written in one pencil (HB) is about 50km. It is an overwhelming long distance and economical compared with other Writing instruments. However, the written load is set...

https://www.tombow.com/en/mamechishiki/p25/

Pencil Price Difference

There is a price difference in a pencil first, it depends on the difference of the core. The difference in the core is mainly due to the granularity of graphite and clay, or fineness. There is a diffe...

https://www.tombow.com/en/mamechishiki/%e9%89%9b%e7%ad%86%e3%81%ae%e4%be%a1%e6%a0%bc%e5%b7%ae/

About the types of colored pencils

Separating the colored pencils from the shape is divided into the one that the entire tree axis, the paper winding, and the axis are the core. Although the wooden axis colored pencil is a very common...

https://www.tombow.com/en/mamechishiki/p18/