Necessity is the mother of invention. With time every problem has been addressed by providing a new and improved innovative product which makes our life simple and the product a hit.
One of the most useful school and office stationary products is correction pen; its fluid was invented in 1951 by the secretary Bette Nesmith Graham, founder of Liquid Paper.
This correction pen works well enough. The fluid flows best when the pen tip is moved in small circles over the relevant mistake, overlapping the fluid lines as little as possible. Compared to other correction methods, the novelty of a retractable correction pen is more practical than it would at first seem. The worries of losing a cap and having a correction pen or an entire bottle of correction fluid dry up completely are absent; though the pen tip will dry up between uses, a few small circles on the corner of a page will have the ink flowing in only a few seconds. However, I will mention that the fluid capacity is somewhat underwhelming, if you are by any means obsessive in your corrections, you might consider ordering more than one or sticking to the bottle and brush approach.
I find the best technique for using this correction is to gently squeeze the barrel while using a dabbing motion of pen against the paper. A bit more correction fluid can be coaxed out in a small "glob" if the tip of the pen is pressed against the paper while the barrel is squeezed, however, you will not produce much of a glob. This pen is not for large areas of text that need covering. It will handle small, precision areas.