Black ballpoint pen for learning and office use

The writing principle of the ballpoint pen is mainly to use the ball and the paper when writing.
Ballpoint pen photo album
Ballpoint pen photo album
The direct contact of the surface produces friction, which makes the ball roll in the ball seat, bringing out the ink or ink in the pen core, so as to achieve the purpose of writing.

A ballpoint pen is a pen that uses ink and different pigments to write. The nib is a small steel ball. The small steel ball is embedded in a small cylindrical copper bowl, and then connected to a plastic tube containing ink. The ink flows down from the surroundings as the steel ball rotates.

The pigment of ballpoint pen ink is dye. There are three main ink colors: blue, red, and black, of which blue ink is used the most. In the past, the pigment components in blue ink were salt-based royal blue and salt-basedgreen lotus, and the solvents were oxidized castor oil and ricinoleic acid.
Because the basic dyes are not light fast (light fastness is only level 1-2), are not heat resistant, and are not resistant to acids and alkalis, they have poor durability and have been eliminated. market
structure
structure
The “424” blue ball-point pen and the “322” black ball-point pen on the market have better handwriting durability.

There are frequent reports of toxic scented ballpoint pens. The volatile organic compounds contained in inferior scented stationery are toxic and harmful to the human body. However, we have not heard of the incidents of poisoning caused by normal use of oily ballpoint pens that are not mixed with volatile organic compounds.