How long does a pure blue pen word last black too, pure black too

I haven't tested it yet, but I have a lot of pure blue and black ink handwriting from 50 years ago, and it's still very clear without any signs of fading. Therefore, the handwriting written in pure blue ink and black ink, if preserved, will definitely be fine for 50 years.

Pure blue pen characters don't last as long as black ones.

Pure blue ink, my bottle of slag is almost gone after only half a year, and the handwriting of the better bottle from years ago is still there, and the blue and black ones will not fade at all, but they will turn green......As for the blue ink of the catfish, it is said that it will never fade, and I don't know if I haven't used it, so I plan to put a bottle in the second half of the year....

I turned out a homework book from more than 30 years ago at home, and the pen words on it have not faded.

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 the "322" black ballpoint pen on the market are more durable to write with it.

The main component of carbon ink is carbon (C), which is chemically stable at room temperature and pressure, and is not easy to react with other substances. Therefore, the text written in carbon ink is easy to preserve and does not fade easily.

There are three common colors of ink: red, 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.

Darkens and lasts for a long time

Mainly tannic acid (C4H10O9), gallic acid (C7H6O5?).H2O) and ferrous sulfate (FeSO4) and other components are combined with each other to form ferrous tannin and ferrous gallate, which become insoluble ** iron after oxidation, that is, iron tannin and ferric gallate, the former enhances water resistance, and the latter enhances blackening, so that the ink is water-resistant, black, and the color is long-lasting.

Because the black color is carbon trivia ink.

The red pen is used for reversal, and it cannot be used to make accounts, and it is generally used with a fountain pen and a signature pen, and the black pen cannot be used with a ballpoint pen and pencil.

Yes (in the case of a pen).

If you use a ballpoint pen, even if it is blue-black, it will not work (the words written on the ballpoint pen will not be stored for long and will melt, so it is not suitable for long-term storage).

As long as the pen is not red.

It is best to fill in with a carbon pen, because the voucher and account book are kept for 15 years, and the handwriting is not easy to change color.

It cannot be directly replaced with a black ink sac.

It needs to be washed.

Fountain pens with ink sacs and ordinary fountain pens are used in writing specially.

The time is the same, the difference is because the assembly method will be different, the specifications of each brand of pen ink sac are different, first you have to find the matching ink sac. Generally, the opening of the ink sac is relatively weak or there is a small bead to seal, and the back of the pen will naturally open the ink sac when pressed, and the ink can be released into the fountain pen. When the ink runs out, pull it out and replace it with a new one.

General Steps:

1.Squeeze out the ink in the pen and ink capsule first;

2.Then, use clean water and repeatedly suck and squeeze to wash the ink inside;

3.Secondly, squeeze out the water in the pen and ink sac, and try not to have residual water;

4.Finally, you can use a new ink.

In general, it is required, otherwise the ink will mix, the color will be blue and black, and the pen may get stuck due to different inks. But some pens are not cleanable. Anyway, my pens are very ordinary, and I always wash them.

It is best to clean it, one is to ensure that there is no coloring, and the other is to protect the pen bladder.

It's best to wash it and change the ink! The content of C in the black ink will be higher, and there will be more precipitation after mixing.

To wash, directly suck the water into it several times.

Yes, you can change it. However, the nib needs to be cleaned, otherwise the color will become impure.

It is best to wash it, use warm water, absorb the pen bag and gently rub it with your hands, and shake the water inside to change the ink after washing it several times.

Yes, you can change it. However, the nib needs to be cleaned.

This can't be replaced, because the ink sacs are connected.

Yes, it's just that there is some color difference in the writing words, and if you spend a lot of money to buy your fountain pen, then you should wash it.

It's best to clean it, otherwise different brands of ink are mixed with easy to make the pen appear knotted, that is, it is the kind that is dry, and it is best to clean it after not using it for a long time.

It's best to wash it, but it can be used without washing.

Yes, first rinse with cold water, then wash with warm water, and finally rinse with hot water, dry naturally or blow dry before changing.

Of course, you can't just change it. How old are you and haven't used a fountain pen? The pen should be cleaned before it can be replaced with black ink.

Yes, but you need to use a hot spot to scald the hose.

It can't be changed directly, it's best not to change it, which may cause blockage inside, and sometimes changing the same color ink of different brands may cause blockage problems.

Wash the pencil bag first, and you can use it.

No, use it to clean, otherwise it is easy to clog and react physically.

If you change it, clean it.

Yes, it's good to wash it, but it's not easy to use.

The words that come out of blue-black ink are blue at first, which is the color of the blue dye. Slowly, the blue ink was oxidized in the air. The colorless ferrous tannins is oxidized to black iron kneaded acid, and the handwriting turns from blue to black, so that it becomes blue-black.

It depends on personal preference!

Personally, I prefer the pure blue ones!

The writing looks very comfortable!

Black is a little neater and more formal.

The blue ones are more comfortable to look at.

But this one depends on personal preference.

Blue-black, I also went from pure blue to blue-black.

It depends on personal preference.,It seems to be more formal with blue and black.,Well,It's also pretty good-looking .......

This depends on personal preference. Blue-black handwriting lasts longer.

Check the straw and nib in the pen bag to see if the ink you have used recently has a lot of impurities, causing clogging or something.

If you have time, clean up the pen bag with water, and then remove all the water in the pen, and then absorb the ink from the new, the ink is best to use black and blue, if there is still a problem, that is your pen quality department clearance.

It depends on the color of the matching paper, and it looks good to look black from these two pictures.

I feel that the blue one is better!

The pure blue color fades after a little longer, and the blue-black ink handwriting will become darker and darker over time, and it is not easy to fade.

The main ingredient of blue ink is ferrous tannic acid, in the air, it will be oxidized by oxygen into iron tanninate, add gum arabic and preservatives, but because it is a soluble blue dye, it is easy to fade over time, for this reason, tannic acid or gallic acid (or both) and ferrous sulfate should be added to produce colorless and water-soluble ferrous tannin or colorless ferrous gallate. They are oxidized in contact with air, resulting in a black or blue-black precipitate of high-grade complexes that make the ink color long-lasting.

I've seen blue-black being dark blue. Pure blue is sky blue. It seems that fountain pens are generally black.

Pure blue is not waterproof, blue-black is waterproof after writing discoloration, and the blue-black ink handwriting will become deeper and deeper over time. In addition, the ink has a variety of colors, black, red, green, purple, orange, brown, etc., all of which have been produced by manufacturers to meet the needs of consumers.

You're wrong! And carbon ink! It's black! ......