The softest drawing pencil is typically considered to be a 9B pencil.
The "B" in pencil grading stands for blackness, and the number indicates the degree of softness. Higher numbers signify softer leads, which produce darker and richer lines.
The "H" in pencil grading stands for hardness, and higher numbers indicate harder leads, which produce lighter and finer lines.
9B pencils are known for their extremely soft leads, which create deep black lines and are ideal for blending and shading.
Other very soft pencils include 8B, 7B, and 6B, with 8B being the next softest after 9B.
These pencils are often used by artists and illustrators for creating realistic drawings, portraits, and expressive sketches.
While 9B pencils are the softest, they are also very fragile and prone to breakage.
It is important to handle them with care and use a sharpener specifically designed for soft leads.