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/

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/

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/

ballpoint pen for writing in space

It is possible to write in the water ballpoint pen of the pressurized type ballpoint pen pen ballpoint pen and the recently reduced but batting type....

https://www.tombow.com/en/mamechishiki/b45/

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/

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/

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...

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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/

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/

About ink Induction (capillary phenomenon)

The ink of the marking is drawn out by using the principle that the ink is pulls to the narrow one of the gap even if power is not added from the outside. A rough flow is the form of batting (relay co...

https://www.tombow.com/en/mamechishiki/m29/

What is a marking pen?

First, when you think about what you call a marking, it is defined as a pen that is an ink storage body of batting or liquid type and that induces ink to tip nib by capillary phenomenon. And, the mark...

https://www.tombow.com/en/mamechishiki/m28/

Tips for sharpening a pencil with a knife

In order to cut the blade as hard as possible, it is better to use the front of the blade to cut only the wood first, and then use the original blade to make the blade stand and cut the core. The poi...

https://www.tombow.com/en/mamechishiki/p27/

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/

About the shape of the pencil axis

When I have a pencil, because it is three fingers, it is be able that the number of times is correct. In general, it is said that it is rolling. There are many circular axes in colored pencils, and i...

https://www.tombow.com/en/mamechishiki/p23/

The length and thickness of the pencil

The length is 172mm or more in JIS standard. The first person to decide the length closest to this is Germany Luther Farber. It proposes to "7 inches (17.78 cm)" around 1840. This length is said to h...

https://www.tombow.com/en/mamechishiki/p22/

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/

On the degree representation expressed in 1, 2, 3

In Europe and the United States, the degree was expressed in 1, 2, 3. 1 equals B, 2 is HB, and 3 is H. It is now a way of expressing H, HB, and B....

https://www.tombow.com/en/mamechishiki/p19/

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 do you mean by the thickness of a pencil?

In JIS, the reflectance when written under certain conditions is defined as 0.30 ~ 0.47 in HB, otherwise it is good if the upper and lower degree is not reversed respectively BASED on HB. It is said t...

https://www.tombow.com/en/mamechishiki/p17/

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/