English name of mechanical pencil

The mechanical pencil is named after Tokuji Hayakawa, the founder of Sharp Corporation, and is called Mechanical Pencils in English. In the Japan, it is nicknamed such as a mechanical pencil, and is e...

https://www.tombow.com/en/mamechishiki/s65/

Spare Leads Eco

The eco Mark and the green purchasing method are prescribed for the container containing the core, and the recycled material (recycled plastic or recycled paper) is used. In the Tombow , recycled plas...

https://www.tombow.com/en/mamechishiki/s62/

About the concentration of the Spare Leads and the Pencil

In JIS, both the Spare Leads and the pencil core were originally the same standard. However, in order to be consistent with international standard ISO, we have established JIS standards separately. Si...

https://www.tombow.com/en/mamechishiki/s60/

Type of core

In the market, there are 12 types of core diameters: 0.2, 0.3, 0.4, 0.5, 0.7, 0.9 mm, and the intensity is 4B to 6H (4B, 3B, 2B, B,HB, F, H, 2H, 3H, 4H, 5H, 6H). Tombow has a core diameter of 0.3mm, 0...

https://www.tombow.com/en/mamechishiki/%e8%8a%af%e3%81%ae%e7%a8%ae%e9%a1%9e/

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/

Performance required for Spare Leads

1. Be able to write thick The grain of the core is fine, and it adheres to the fiber of the paper snugly, and settles. 2. Strong There is no core break during writing. 3. Smooth There is no catch...

https://www.tombow.com/en/mamechishiki/s57/

Raw material for Spare Leads

The first was the sintering of the clay, which is the main raw material, the graphite and the binder, as well as the pencil core. However, it was not possible to obtain enough strength when the core d...

https://www.tombow.com/en/mamechishiki/s55/

History of Spare Leads

Since the release of the Eversharp in 1838, the Spare Leads was made of graphite clay (same as pencil core), with a core diameter of 1.0 and 1.5 mm length of about 30mm. However, in 1962, a 0.5 mm syn...

https://www.tombow.com/en/mamechishiki/s54/

History of neutral ballpoint pen

The newest is this neutral ballpoint pen pen (Gel ink ballpoint pen ). It has been released from domestic manufacturers around 1984. As a new generation of ballpoint pen using the word neutral ink, ne...

https://www.tombow.com/en/mamechishiki/b49/

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/

English name of ballpoint pen

In the United States, the oily ballpoint pen Pen is called a ball point pen. The thing about the water-based ballpoint pen is called a roller pen. By the way, it is called K-gel Punkt shreiber in the ...

https://www.tombow.com/en/mamechishiki/b46/

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/

Advantages of ballpoint pen

It is a ballpoint pen pen that uses the Writing ball as a pen tip, but why is it widely used worldwide? ○ Omni-Directional: vertical, horizontal, and naname because it can be written smoothly in any ...

https://www.tombow.com/en/mamechishiki/b41/

Variety of pigment

Dye or pigment is used in some stationery. To briefly explain the difference, dyes are like sugar water in which color particles are dissolved in a liquid, and pigments are like ink liquid in which c...

https://www.tombow.com/en/mamechishiki/m39/

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/

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/

About JIS of pencil

Pencil JIS was established in 1951 and has contributed to the improvement of pencil quality in Japan for about 50 years, but in 1998 the item designation was canceled as part of the deregulation and i...

https://www.tombow.com/en/mamechishiki/p24/

Core differences

The difference in the core is mainly in the grain size of graphite and clay, in other words, the technique and nerves are used for grinding, refining and processing of raw graphite as a high-grade cor...

https://www.tombow.com/en/mamechishiki/%e8%8a%af%e3%81%ae%e9%81%95%e3%81%84/

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/

What is the degree and concentration of the core?

It is a symbol from 6B to 9H representing the thickness and hardness of the pencil core. The core of the pencil is from stiff to soft, depending on the proportion of graphite and clay, for example HB ...

https://www.tombow.com/en/mamechishiki/p16/

Color Pencil Core Ingredients

The core of the colored pencil is made of coloring, extender pigment and wax. Looking from the ingredients, it is oily. After you draw a picture with colored pencils, you can dissolve the water by mel...

https://www.tombow.com/en/mamechishiki/p15/

A tree used for pencils

Pencils are mainly used in North American incense Cedar (Hinoki). Wood is a natural recycling resource and environmentally friendly material. Trees used for pencils are also planted and managed well....

https://www.tombow.com/en/mamechishiki/p14/

Clay used for the core of a pencil

Pencils use Germany clay. Although the clay can be taken Japan, there is plasticity suitable for the molding of the pencil core, the crystallization proceeds at a relatively low temperature, the physi...

https://www.tombow.com/en/mamechishiki/p13/

Graphite used for the core of a pencil

Graphite (graphite graphite) is also known as a stone ink and is naturally produced as a companion of Diamond and Coal (allotrope). Unlike the same fellow coal, it has a layered structure and is slipp...

https://www.tombow.com/en/mamechishiki/p12/

The inventor of the pencil with rubber

In 1858, an American Mr. Lippmann was invented with a rubber pencil. He thought that the eraser which had been put Plastic Eraser on by the side during the drawing disappeared soon, and it was trouble...

https://www.tombow.com/en/mamechishiki/p09/

History of the pencil industry

In the Meiji era, a civilization enlightenment was created, and it was imported in large quantities. In 1885, 25,750 Gross, and in Meiji 38, statistics that were imported about ten times remain. The ...

https://www.tombow.com/en/mamechishiki/p08/

History in pencil Japan

It is said that the oldest pencil in the Japan was presented to Tokugawa Ieyasu and was used. It is now stored in the Toshogu Shrine of Kunnoh Mountain. It is said that Ieyasu actually used it, but i...

https://www.tombow.com/en/mamechishiki/p06/

History of pencil paper

An epoch-making manufacturing method such as a paper pencil was born by the climate not caught in the tradition and the history of the United States. At that time, the tree which suited the pencil was...

https://www.tombow.com/en/mamechishiki/p05/