Elementary rules should be followed in every style of drawings. Here, the artists teaches us the rules for shading in the drawings. Shadings gives the objects more dimension and more character. Thus, all of the artists can practice more to master this technique. First, you should pay attention to the hardness of the pencils. Next, you should hold the pencils the right way because you can smudge your drawing. Normally, you should be attentive for the direction of shading. Next, the gradients and contrast are important for the shape and volume. And lastly, you should be careful how you detach the pencil from the paper.
Elementary Rules for Shading Drawings
See the tutorial below if you want to try the steps and rules for shading.