History of the Plastic Eraser

The graphite was discovered in the 16th century, and it was used as a pencil, but at that time, it was erased with a wheat bread without good erase tools. In 1770, the origin of the Plastic Eraser fou...

https://www.tombow.com/en/mamechishiki/%e6%b6%88%e3%81%97%e3%82%b4%e3%83%a0%e3%81%ae%e6%ad%b4%e5%8f%b2/

Types of Plastic Eraser

There are two types of Plastic Eraser , the so-called rubber-shaped eraser made of natural rubber, and the plastic erase. Because some things are not rubber, it is called "erase" accurately. The rubbe...

https://www.tombow.com/en/mamechishiki/e78/

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/

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/

Types of mechanical Pencils

There are two types of mechanical pencils, which are called " knock mechanism " and "Feeding type". The knock mechanism includes a side knock mechanism type and an automatic knock mechanism type....

https://www.tombow.com/en/mamechishiki/s66/

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/

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/

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/

0.3 mm thicker than the Spare Leads ?

The "core" and "diameter" are defined by JIS standards. The 0.3 mm core will be exactly 0.38 mm on average and will be close to 0.4 mm thick. Each manufacturer is manufactured in accordance with this ...

https://www.tombow.com/en/mamechishiki/s61/

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/

The Difference between water-based ink and oil-based ink

Products using water as the main solvent are water-based inks, and those using organic solvents are oil-based inks. Apparently, the water-based ink is shabby and the oil-based ink is like thick syrup....

https://www.tombow.com/en/mamechishiki/m52/

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/

Writing distance

You can write about 1000m at 1500m and Carnosine Vizno in the office ballpoint pen (BR-NF Core) of the Tombow Pencil ....

https://www.tombow.com/en/mamechishiki/b43/

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/

Basic Ink Configuration

Oily organic solvent + dye + resin + surfactant, Water-based is the basic structure of the aqueous + dye + moisturizing Agent + surfactant + preservative. As for the oily ink, it may be felt that it...

https://www.tombow.com/en/mamechishiki/m38/

Ink injection method

As for how to put in ink, a certain amount of ink may be injected into the filling with a syringe or the like, but the best way is to dip the filling in the ink and let it suck up the ink. The refill...

https://www.tombow.com/en/mamechishiki/m36/

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/

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/

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/

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/