A ballpoint pen is a writing instrument which features a tip that is automatically refreshed with ink. It consists of a precisely formed metal ball seated in a socket below a reservoir of ink. As the pen is moved along a writing surface, ink is delivered. Even though ballpoint pens were ...
Theadditivesstabilize the mixture and give the ink additional desirable characteristics. Depending on the medium that the ink is being made for (pens, printing presses, printers) and the material to be printed, the proportions change. In the case of ballpoint pen ink, the ink is very thick an...
根据第四段Biro's ballpoint pen worked very well,but it wasn't successful until a French man called Marcel Bich began to produce it in his factory in 1950.可知Marcel Bich在他的工厂生产圆珠笔。 故选:C。 5. 【答案】 A 【解析】 推理判断题。根据第四段By 1965, ballpoint pens were available...
A ballpoint pen is a pen that uses a small rotating ball made of brass, steel or tungsten carbide to disperse ink as you write. Guido Mieth / Getty Images In this electronic age of voice mail, e-mail and cell phones, there is still no substitute for pen and paper. Even as you ...
A ballpoint pen contains viscous ink that comes in a variety of colors. The ink can easily leak out of the pen when it cracks or breaks. Ballpoint pens often stain most surfaces that they encounter. The ink stain can transfer to wooden surfaces and it will soak into unprotected wood. If...
The sight of an ink stain on your clothing may freak you out at first. You can remove the ballpoint ink stain with common household ingredients and salvage the clothing if you treat the stain immediately.
Ballpoint ink is made from dye and a mixture of alcohol and fatty acids. The alcohol is to keep the ink running smoothly, and the fatty acids keep the ballpoint lubricated. The ink is a thick consistency to prevent it from running on the paper. Although this is useful, when storing pens...
or toothpick. Let the message dry. You might also want to write a normal message on the paper so that it doesn't appear to be blank and meaningless. If you write a cover message, use a ballpoint pen, pencil, or crayon, since fountain pen ink could run into your invisible ink. Avoid...
2, to ballpoint pen oil: the stain with cold water soaked, used or carbon tetrachloride gently wipe, and then wash liquid, clean water. You cant wash it with gasoline. Can also be coated with toothpaste or a small amount of soap gently rub, if there are traces of alcohol can be ...
Businessmen made significant fortunes by purchasing the rights to manufacture the ballpoint pen in their country, but one is especially noteworthy: Marcel Bich, the man who bought the patent rights in France. Bich didn’t just profit from the ballpoint; he won the race to make it cheap. When...