Do ballpoint pens have an expiration date and do fountain pens have an expiration date?

In general, ballpoint pens and refills should be stored in a dry and well-ventilated warehouse, with a storage temperature of 0 40 and a relative humidity of no more than 80%; Ballpoint pen and refill shelf life: two years from the date of manufacture.

If the ballpoint pen is stored for a long time, the oil of the ballpoint pen will volatilize and dry out, which may cause the nib to be blocked, so the ballpoint pen will inevitably have its shelf life.

Ballpoint pen, also known as bic. It is a writing instrument that has become popular in recent decades.

It has the advantages of simple structure, easy to carry, smooth writing, and suitable for copying, so people from all walks of life from school students to office building clerks are happy to use it.

A ballpoint pen is a pen that uses tiny, rotating balls made of brass, steel, or tungsten carbide to release ink onto the paper as you write.

The ballpoint pen is very different from its predecessors – reed pens, quill pens, metal nib pens and fountain pens.

The writing principle of the ballpoint pen is mainly to use the ball ball to produce friction in direct contact with the paper surface when writing, so that the ball rolls in the ball seat and brings out the ink or ink in the refill, so as to achieve the purpose of writing.

A ballpoint pen is a pen that uses ink and different pigments to write. The tip of the pen is a small steel ball, which is embedded in a small cylindrical copper bowl, and then connected to a plastic tube filled with ink, and the ink flows down from all sides with the rotation of the steel ball.

The pigment of ballpoint pen ink is a dye. There are three main ink colors: blue, red and black, among which blue ink is the most used.

In the past, the pigment components in blue ink were salt-based blue and salt-based blue lotus, and the solvents were oxidized castor oil and ricinoleic acid.

Because salt-based dyes are not lightfast (lightfastness is only grade 1-2), heat-resistant, acid-alkali resistant, so the durability is poor, and it has been eliminated.

At present, the "424" blue ballpoint pen and "322" black ballpoint pen on the market, the handwriting with it is more durable.

1. Oil-based ballpoint pen is commonly known as ballpoint pen. Most of the nib balls used are made of stainless steel or carbide materials. The size of the diameter of the ball determines the thickness of the handwriting line.

There are three common ball diameters: 1 mm, millimeter, and millimeter (often indicated on the body or ballpoint refill of the product).

The inks of ballpoint pens are specially made and are mainly made from a mixture of pigments, solvents and viscosities. Common colors are blue, black, and red.

Ordinary ink is mostly used for general writing, and special ink is mostly used for archival writing. The ink used for archival writing is generally marked on the refill, such as the word da on the refill.

Over time, the oil of the ballpoint pen will evaporate and dry out, which may cause the nib to be blocked, so the ballpoint pen will inevitably have its shelf life.

China's GBT26714-2011 standard clearly stipulates: ballpoint pens and refills should be stored in a dry and well-ventilated warehouse, storage temperature 0 40, relative humidity.

Not more than 80%; Ballpoint pen and refill shelf life: two years from the date of manufacture.

There is an expiration date, because if the ballpoint pen is stored for a long time, the oil of the ballpoint pen will volatilize, dry out, and cause the nib to be blocked, so there is an expiration date.

There are regulations: ballpoint pens and refills should be stored in a dry and well-ventilated warehouse, with a storage temperature of 0 40 and a relative humidity of no more than 80%; Ballpoint pen and refill shelf life: two years from the date of manufacture.

Although there is no expiration date, it is certain that it cannot be used after a long time because the oil in it is dry.

Yes To be precise, if the ballpoint pen is left for a long time, the ink inside will dry up, so the pen will not be able to write.

There is no ......But after a long time, the ink inside will evaporate, and if it evaporates, you can't write.

I have a box of ballpoint pens from three years ago here that I can use, but sometimes it will be intermittent. After the nib of the pen is removed, it can be found that the substance inside becomes drier than the normal ballpoint pen ink, and it will not flow out from another section when blowing with great force, and the normal refill will come out as soon as it is blown.

After a long time, it can no longer be used, and the lubricating substance inside is dry.

As long as there is no problem with the tip of the fountain pen, theoretically there is noneShelf lifeBut pen water has a shelf life, generally two years.

Fountain pens are commonly used writing instruments, invented in the early 19th century and designed by American Waltman. The nib is made of metal, which makes it sleek and elastic to write, and is quite smooth.

At the mouth of the pen cap or on the surface of the nib, there are obvious trademark grades and models. It is also divided into dip-type fountain pens, tap fountain pens, and ink sac fountain pens. Pay attention to maintenance and cleaning when using.

Emergence and development:

In 1809, the first patent for a pen was issued in the United Kingdom, marking the official birth of the fountain pen.

In the early days of storing pens, the ink did not flow freely. The author presses down on the plunger to make the ink flow. After writing for a while, he had to press it again, otherwise the ink would not flow. Of course, it is inconvenient to write like this.

In 1829, the Englishman James Bailey succeeded in inventing a nib. It is specially processed and smooth and elastic, so it is smooth and popular. However, the pen must be dipped in ink in order to write.

In 1884, Waterman, an employee of an insurance company in the United States, invented a method of using capillary ** ink, which better solved the above problems. The nib can be removed and the ink is poured with a small dropper rubber sail.

At the beginning of the 20th century, the first fountain pen that could absorb ink on its own appeared, which allowed Shi Kai to use a piston to absorb ink. When the refill is used, a piece of iron is inserted into the gap between the refills and the refill is squeezed to absorb the ink. By 1952, the Schnock pen appeared, which used a tube to suck water into the ink, and it was not until 1956 that the ordinary capillary pen was invented.

There are some art pens and so on.

Pencils have an expiration date. According to the GB T149-1995 standard number, the shelf life of the 2B pencil should be within two years from the date of manufacture, and the storage environment should be dry, ventilated, 0-40, and 80% humidity. Pencil is a type of pen used for writing and drawing and sketching.

Pencils have an expiration date. According to the GB T149-1995 standard number, the storage life of 2B pencils should be within two years from the date of manufacture, and the storage environment should be dry, ventilated, 0-40, and humidity 80%. Pencil He Kong is a pen used for writing and drawing sketches.

Refills have an expiration date. Refills are accessories to writing instruments, and most have a shelf life of 1-2 years. A refill is a ballpoint pen barrel or a tube with ink or ink in a pen barrel, with a metal nib at the front and a writing ball embedded in the nib.

A refill also refers to a pencil strip (pencil lead), while a fountain pen refill is a hose or suction hose inside the barrel.

The most common nib style for gel pen refills is bullet, and the refill nib diameter has an and.

Gel pen refills should be used correctly, otherwise the refills will have problems such as uneven oil output and water leakage caused by broken balls. Don't use too much force on the pencil refill, otherwise it will break the refill.

1. The refill has a shelf life. The shelf life of ballpoint pens and refills is 2 years, the shelf life of highlighters is 1 year, the shelf life of fountain pens, markers, whiteboard markers and other inks is 2 years, and the shelf life of watercolor pens is generally 2 years; The shelf life of toy dough is generally 3 years; The shelf life of oil pastels is generally 3 years. The shelf life of solid glue and glue is generally 1 and a half to 2 years.

2. The production standard implemented by the gel pen manufacturer is "QB T2625-2011 Neutral Ink Ballpoint Pen and Refill". For example, the standard stipulates that the sales packaging of gel pens and refills should have the product name and trademark, the name of the manufacturer, the address, the product model, the implementation standard number, the production date (year, month), the shelf life, the number of threads and other marks. Among them, the shelf life of gel pens and refills is 1 year from the date of manufacture.

Single pen and pen Zhengzhi Qixin can not be marked.

Pencil is a pen commonly used by young children, and no hunger pencil is also very important in some industries, when people buy pencils, they often buy a lot of pencils at one time, but pencils often have to be used for a long time when they are used, and they will worry about whether the pencil will expire, so does the pencil have a shelf life?

According to GB T149-1995 standard number, the shelf life of 2B pencil should be within two years from the date of production, and the storage environment should be dry, ventilated, 0-40, humidity 80%. Well, the pencil that has been seven or eight years old now is not guaranteed to work normally. The staff of the quality supervision institute suggested that when buying pencils, you should go to a regular store or stationery store, and the regular pencils should at least have the factory name, trademark and some signs, etc., and pay attention to observation when buying.

Especially for candidates, the exam is important, don't use the "expired" pencil, go to the regular store and buy a new one.

The pencil is one of the main writing tools in the cultural life of modern people. Wooden graphite pencils originated in England in the 16th century. In the 17th century, Germany built the world's first pencil manufacturing factory.

In the 18th century, the French succeeded in researching and reforming the lead core manufacturing process, which made a major breakthrough in improving the use value of pencils and laid the foundation for the development of the modern limb pencil industry. In the 19th century, Russia, Japan, the United States and other countries successively established pencil manufacturing factories. At the end of the 19th century, pencils from Germany, Japan, the United States and other countries were imported into China and occupied the Chinese pencil market.

2B pencil is a soft pencil, when applying a certain area, the soft pencil is easier to apply evenly, and it has a metallic luster, and it is not easy to break.

The pencil is divided into two parts: the pencil cap and the pencil barrel: the pencil cap is mainly made of polyester material, and the production process can be divided into molding, offset printing, assembly and other processes to complete it. The main decorative materials for the appearance of pencil barrels are nitro fiber pencil paint, printing ink, anodized aluminum foil, eraser head and aluminum hoop.

The production process can be divided into pencil board, lead core, pencil barrel, finished product decoration and other processes. Pencil board processing dissolves and cuts the logs, splits them into wooden blocks with square saws, and cuts them into pencil boards through a board cutter after hydrothermal treatment. The plate is 184mm long, 73mm wide, and thick.

After heating (60 120) drying and high temperature (130 200) denaturation, the pencil board can reach the degree of softening and easy rolling.

Lead core processing graphite lead core is graphite and clay according to a certain proportion, after kneading machine, three-roller machine mixing, through the core press machine extrusion out of a certain size (such as HB 3H lead core diameter of the lead core, heating (50 150) drying and high temperature (800 1100) roasting, so that it has a certain mechanical strength and hardness, and finally oil immersion treatment and made. Color-based core processing is similar to graphite core, but does not require sintering.

Exterior decoration processing will paint and print the white pencil for decoration, as well as cutting, printing trademarks, filling eraser heads, pen caps and other processing, so as to make it a finished pencil with certain specifications, appearance colors and patterns.