How long do non carbon inks last? How about the Hero Dax 304?

The ink doesn't really disappear after a while on the paper... It's just a matter of bulletproof (meaning waterproof + chemical repellent). Pure black is a dye ink that washes off, while carbon can continue to leave a handwriting on the paper.

However, most carbon ink is easy to block the pen, anyway, people are not writing in water, and there is no big problem with pure black ink.

If there are requirements for preserving handwriting, it is recommended that Beijing Carbon, Eternal Black, and Pearl River Ink. Beijing carbon is not easy to block the pen compared to other carbon, and some people's fountain pens use North Carbon, and they don't use the fountain pen to open it for a month. It is called "divine water" by many pen pals"。

And Eternal Black Ink is a high-end product, except for the slower drying speed, it is commendable in other aspects. Although Pearl River ink is a dye ink, it also has a certain degree of water resistance.

The ferric oxalate in carbon ink will form ferrous oxalate ammonia after a long time, and precipitate will appear, which is easy to block the pen. If you don't use it for a long time, you should still close the cap tightly, put it in a cool place, and not place it at high temperatures or expose it to the sun, the hero's reputation is good, my bottle has been put for more than three years, in fact, the most important problem is that it will volatilize itself without it for a long time, and it may be wiped out within the shelf life.

Non-carbon inks.

The shelf life is generally about two years, as long as the cap is tightened after use to prevent oxidation and evaporation, most inks are two years or even longer.

Shelf life of ink: QB T stipulates that the shelf life of ink for fountain pens is 2 years.

Anti-desiccant is also used in the experiment, the main function is to prevent the oxidative drying of the ink surface or ink, so that the ink and ink have a better visual effect, and at the same time prolong its service life and retention period, and can also improve the performance of the ballpoint pen when applied, and the anti-desiccant is also an antioxidant.

You're stupid, you don't look at the expiration date, if not, go play with the ink seller.

Brother, don't use pigment ink to learn Chinese medicine, it's bad when it's damp, and the ink will fade in a few years. You can **search for a needle pen, using ink (it is best to understand how to use it before buying, and cut the probe short if it is too long). Otherwise, you can use carbon ink or blue-black ink.

Don't worry, as long as you don't touch the water and don't expose it to the sun for a long time, it's hard to fade, and it's okay for more than 20 years.

Carbon ink, carbon ink contains carbon elements, carbon is chemically stable at room temperature and pressure, and is not easy to react with other substances.

Of course, it's not easy to fade because of the carbon, and the couplets and notes are not all written with a black pen, that's why.

Carbon ink does not fade easily and retains for a long time because the carbon atoms are not reactive.

Carbon ink lasts a long time and does not fade easily.

Carbon ink, because carbon ink contains carbon, it is not easy to oxidize.

Carbon ink has a long retention time.

The shelf life of non-carbon ink is generally about two years, and it cannot be used after the ink has passed the two-year shelf life.

There are four common colors of ink: red, blue, black, and blue-black. Red ink is generally used to mark assignments and is used in a smaller range. Blue and black ink is deep and solemn in color, not easy to fade, and smooth in writing, which is a kind of ink that is more commonly used in people's study and work.

Black ink is the most ideal carbon ink, black ink has concentration, shiny, written on paper black and white, very eye-catching, used to write pen words or write pen calligraphy works, the best effect.

The shelf life of non-carbon ink is generally about two years, as long as the cap is tightened after use to prevent oxidation and evaporation, most inks are two years or even longer.

The life of carbon inks depends on the life of the carbon and the emulsifier. Because there are enough preservatives added to it, it can be stored for a long time (three to five years), and it can still be used even after the expiration date, but it will precipitate after a long time, and it is easy to block the pen.

Try to work hard.

Pluck up the courage to give up on you.

Always uncompetitive.

Didn't learn to be quiet so quickly.

Even tears are always reminding.

I can't let you go.