1, brush quality: the quality of white hard pen brush is very important, which is directly related to the writing effect and feel. A good white pen for calligraphy should be able to maintain the stability of the pen tip, so that the writing lines are moderate in thickness, smooth and clear, easy to take ink and easy to color.

2. Material and manufacturing technology: The material and manufacturing technology of white hard pen calligraphy pen will also affect its quality. Generally speaking, a good white hard-pen calligraphy pen should be made of high-quality materials, such as tungsten steel and ginkgo wood, which are carefully processed and baked to ensure the strength and durability of the nib.