What does the term "B" in pencil grading signify?

The term "B" in pencil grading indicates the softness of the lead. In the grading system, pencils are marked with "H," "B," and "F," among other letters and numbers, to denote their characteristics. The "B" stands for "black" and signifies that the pencil produces a darker mark, which is achieved by using a softer lead. This softer lead allows for a richer, darker line, making it ideal for shading and artistic work.

The higher the number accompanying the "B," the softer the pencil and the darker the mark it produces. This grading system helps artists and designers select the appropriate pencil for their needs based on the desired darkness and softness. The other options, such as hardness, water-solubility, and color vibrancy, refer to different characteristics of materials and are not related to the grading of pencil lead.