Hot brush ink contains color-developing material, color-developing agent and color-changing temperature regulator. At room temperature, the chromogenic substance and chromogenic agent combine to produce color, but when the temperature exceeds about 60℃, the chromotropic temperature regulator will prevent the chromogenic substance and chromogenic agent from combining, thus making the color disappear. When the temperature drops to extremely low, handwriting will reappear.

The rubber head at the end of the pen rubs the paper to generate heat, which makes the ink handwriting transparent and looks like it has disappeared. In chemical terms, this is called "thermal reaction".

Features:

Erasable pen handwriting can be erased in a few hours with an ordinary eraser like a pencil. The preserved handwriting will not be soaked in water and will not fade after drying for a long time. After 48 hours, it will become indelible and permanent handwriting, which can be maintained for a long time. This product is similar to other ballpoint pens in appearance and writing, and has many colors such as blue, black and red.

Erasable pen is a good choice for homework, but when signing important documents or exams, it is best to choose a signature pen. This is because the writing of erasable pen will disappear at high temperature. Under the baking of the lighter, the writing of the erasable pen gradually disappeared. Therefore, to be on the safe side, please don't use erasable pens for valuable securities and important documents that need to be signed.