1. On the usefulness of both:

Sketchbooks are special books for sketching creation and practice, sketchbooks, and books for sketching exercises.
2. On paper specifications:

Sketchbooks are generally divided into square and long, with different opening sizes. Generally, rectangles are available in sizes of sixteen, eight, and four. The paper is thicker and the paper products are better. Most of them are loose-leaf pages for easy drawing.

Sketchbooks are easy to carry around, and are generally used for sketching or sketching. The front and back sides of the paper are different in roughness, the front side is rougher and the back side is more delicate. It is bound into a booklet, which is convenient to save the paintings of daily practice. Used in various fields of painting. Common specifications are 8K, 16K, etc.

3. In use:

Sketchbooks are easier to store and carry than painting with a single paper clip, and are popular among artists. Also suitable for students to take notes. You can also clip note paper, postcards, etc.

The size of the paper used by beginners in sketchbooks should be 8 or 4K. The coated paper and copy paper of 16K are suitable for drawing with pens and ballpoint pens.